Baby Girl & Boy Names That Mean Deep Sea

The ocean has always inspired parents looking for names full of mystery and depth. Names meaning “deep sea” carry a sense of vastness, calm, and strength. In this article, you’ll find a wide collection of boy, girl, unisex, and cultural names that connect to the deep sea.

Whether you want something modern, traditional, or rooted in mythology, the sea offers endless inspiration. Below we’ve organized names by category to make your search easier and more enjoyable.

Boy Names That Mean Deep Sea

Marin

• Origin: Latin
• Meaning: Of the sea
• Description: A strong, simple name with a direct connection to the ocean, popular in several European cultures.

Kai

• Origin: Hawaiian
• Meaning: Sea
• Description: Short and powerful, Kai is widely used across cultures for its oceanic meaning.

Mariner

• Origin: English
• Meaning: One who sails the sea
• Description: A rare but evocative name suggesting deep ocean voyages.

Murphy

• Origin: Irish
• Meaning: Sea warrior
• Description: A surname-turned-first-name with strong nautical roots.

Morgan

• Origin: Welsh
• Meaning: Sea circle / sea defender
• Description: A classic name tied to legends of the sea.

Doran

• Origin: Irish
• Meaning: Stranger from the sea
• Description: A unique choice with mythological sea associations.

Cassius

• Origin: Latin
• Meaning: Deep blue (associated with the sea)
• Description: A bold name often linked to ocean depths.

Cole

• Origin: English
• Meaning: Victory of the people, sometimes linked to dark sea waters
• Description: Short and modern with subtle oceanic ties.

Nereus

• Origin: Greek
• Meaning: God of the deep sea
• Description: From Greek mythology, Nereus was an ancient sea deity.

Triton

• Origin: Greek
• Meaning: God of the deep sea
• Description: Son of Poseidon, Triton ruled the deep ocean waters.

Pontus

• Origin: Greek
• Meaning: The deep sea itself
• Description: Pontus personifies the sea in Greek mythology.

Murdoch

• Origin: Scottish
• Meaning: Sea protector
• Description: A strong name with deep maritime heritage.

Aegir

• Origin: Norse
• Meaning: God of the deep ocean
• Description: A powerful Norse sea deity ruling the deep waters.

Tangaroa

• Origin: Polynesian
• Meaning: God of the deep ocean
• Description: A revered deity of the sea in Polynesian mythology.

Yam

• Origin: Hebrew/Canaanite
• Meaning: Sea / deep waters
• Description: An ancient name referring to the primordial deep sea.

Maris

• Origin: Latin
• Meaning: Of the sea
• Description: A graceful name with deep oceanic roots.

Beck

• Origin: English
• Meaning: Stream leading to deep water
• Description: A modern short name with a watery origin.

Calder

• Origin: Scottish
• Meaning: Rocky water / deep stream
• Description: A strong nature-inspired name.

Doyle

• Origin: Irish
• Meaning: Dark stranger from the sea
• Description: A surname with deep maritime mythology.

Murdock

• Origin: Scottish
• Meaning: Protector of the sea
• Description: A bold name often linked to deep ocean guardianship.

Lir

• Origin: Irish
• Meaning: Sea / ocean deity
• Description: A name from Irish mythology tied to the sea god Lir.

Girl Names That Mean Deep Sea

Marina

• Origin: Latin
• Meaning: Of the sea
• Description: A timeless name with strong ocean ties.

Mira

• Origin: Latin/Sanskrit
• Meaning: Sea / ocean
• Description: A short, elegant name often linked to the sea.

Yamuna

• Origin: Sanskrit
• Meaning: Deep waters / river of the sea
• Description: A poetic name connected to vast waters.

Maris

• Origin: Latin
• Meaning: Of the sea
• Description: A delicate name reflecting deep ocean beauty.

Nerida

• Origin: Greek
• Meaning: Sea nymph of the deep
• Description: Inspired by mythical sea spirits living in deep waters.

Calypso

• Origin: Greek
• Meaning: Hidden one, associated with the deep sea
• Description: From mythology, Calypso ruled a mysterious island deep at sea.

Thalassa

• Origin: Greek
• Meaning: The sea / deep sea
• Description: Personification of the sea in Greek mythology.

Murron

• Origin: Scottish
• Meaning: Of the sea
• Description: A soft, lyrical name with maritime roots.

Doris

• Origin: Greek
• Meaning: Gift of the deep sea
• Description: From mythology, Doris was a sea goddess.

Galatea

• Origin: Greek
• Meaning: Sea goddess of calm waters
• Description: A graceful name tied to the deep blue sea.

Hali

• Origin: Greek
• Meaning: Sea
• Description: A short, sweet name with oceanic roots.

Naida

• Origin: Greek
• Meaning: Water nymph of the deep
• Description: A flowing name connected to deep water spirits.

Marella

• Origin: Latin
• Meaning: Shining sea
• Description: A modern, elegant name with deep ocean charm.

Pelagia

• Origin: Greek
• Meaning: Of the deep sea
• Description: Directly derived from “pelagos,” meaning the open deep sea.

Yemaya

• Origin: Yoruba
• Meaning: Mother of the deep ocean
• Description: A powerful deity representing the depths of the sea.

Ondine

• Origin: Latin
• Meaning: Spirit of the deep waters
• Description: A romantic name tied to water spirits.

Marisol

• Origin: Spanish
• Meaning: Sea and sun
• Description: A vibrant name with strong maritime ties.

Talassa

• Origin: Greek variant
• Meaning: Deep sea
• Description: A poetic variant of Thalassa.

Morwenna

• Origin: Cornish
• Meaning: Sea wave / of the sea
• Description: A lyrical Celtic name tied to ocean waves.

Avarna

• Origin: Modern/Coined
• Meaning: From the deep waters
• Description: A unique, flowing name with oceanic resonance.

Unisex Names That Mean Deep Sea

Kai

• Origin: Hawaiian
• Meaning: Sea
• Description: A globally popular unisex name with deep ocean meaning.

Maris

• Origin: Latin
• Meaning: Of the sea
• Description: Elegant and usable for any gender.

Pelagia

• Origin: Greek
• Meaning: Of the deep sea
• Description: A flowing name suitable across genders.

Mira

• Origin: Sanskrit
• Meaning: Sea / ocean
• Description: Simple, modern, and gender-neutral.

Murron

• Origin: Scottish
• Meaning: Of the sea
• Description: Soft sounding, fitting for any child.

Marin

• Origin: Latin
• Meaning: Of the sea
• Description: Increasingly popular as a unisex choice.

Tangaroa

• Origin: Polynesian
• Meaning: God of the deep ocean
• Description: Strong and meaningful across genders.

Doran

• Origin: Irish
• Meaning: Stranger from the sea
• Description: Mysterious and adaptable.

Yam

• Origin: Hebrew
• Meaning: Sea / deep waters
• Description: Ancient and simple, fits any gender.

Beck

• Origin: English
• Meaning: Stream to deep water
• Description: Modern and minimalist.

Calder

• Origin: Scottish
• Meaning: Rocky deep stream
• Description: Strong yet gentle sounding.

Lir

• Origin: Irish
• Meaning: Sea deity
• Description: Mythological and versatile.

Aegir

• Origin: Norse
• Meaning: God of the deep ocean
• Description: Bold and unisex-friendly.

Marisol

• Origin: Spanish
• Meaning: Sea and sun
• Description: Bright and adaptable.

Naida

• Origin: Greek
• Meaning: Water nymph of the deep
• Description: Flowing and gentle.

Ondine

• Origin: Latin
• Meaning: Spirit of deep waters
• Description: Poetic and graceful.

Morwenna

• Origin: Cornish
• Meaning: Sea wave
• Description: Lyrical and timeless.

Hali

• Origin: Greek
• Meaning: Sea
• Description: Short and easy to pronounce.

Galatea

• Origin: Greek
• Meaning: Sea goddess
• Description: Elegant and mythological.

Thalassa

• Origin: Greek
• Meaning: The deep sea
• Description: Direct and meaningful.

Japanese Names That Mean Deep Sea

Umi

• Origin: Japanese
• Meaning: Sea / ocean
• Description: A simple, popular name directly meaning sea.

Kaito

• Origin: Japanese
• Meaning: Sea / ocean flying
• Description: A modern name combining sea and flight imagery.

Wataru

• Origin: Japanese
• Meaning: To cross (often used with sea/ocean kanji)
• Description: Suggests crossing vast deep waters.

Marina

• Origin: Japanese (loanword)
• Meaning: Of the sea
• Description: Used in Japan with the same oceanic meaning.

Minato

• Origin: Japanese
• Meaning: Harbor / deep waters near the sea
• Description: Connects to deep coastal waters.

Kaina

• Origin: Japanese
• Meaning: Sea / ocean
• Description: A softer variant referencing the sea.

Riko

• Origin: Japanese
• Meaning: Child of the sea (with certain kanji)
• Description: A gentle name with oceanic roots.

Umiko

• Origin: Japanese
• Meaning: Child of the sea
• Description: Directly derived from “umi,” meaning sea.

Kairi

• Origin: Japanese
• Meaning: Sea / ocean village
• Description: A modern name with deep ocean roots.

Kaida

• Origin: Japanese
• Meaning: Little dragon of the sea
• Description: Combines sea imagery with mythical strength.

Reiko

• Origin: Japanese
• Meaning: Can include “deep” depending on kanji
• Description: A name that can carry deep, profound meanings.

Shio

• Origin: Japanese
• Meaning: Tide / sea current
• Description: Refers to ocean tides and depth.

Kaiya

• Origin: Japanese
• Meaning: Forgiveness of the sea / ocean
• Description: A blend name popular for its oceanic feel.

Umito

• Origin: Japanese
• Meaning: Sea person
• Description: Reflects connection to the sea.

Watase

• Origin: Japanese (surname-origin)
• Meaning: One who crosses the deep waters
• Description: A name with maritime heritage.

Kaishin

• Origin: Japanese
• Meaning: Heart of the sea
• Description: Suggests depth and emotional connection to the ocean.

Umika

• Origin: Japanese
• Meaning: Fragrance of the sea
• Description: A poetic feminine name.

Marin (Japanese usage)

• Origin: Japanese
• Meaning: Of the sea
• Description: Adopted into Japanese naming culture.

Kaiku

• Origin: Japanese
• Meaning: Echo of the sea
• Description: A rare, poetic ocean-inspired name.

Umino

• Origin: Japanese
• Meaning: Of the sea
• Description: A surname-style name meaning belonging to the sea.

Last Names That Mean Deep Sea

Marsh

• Origin: English
• Meaning: Wet, deep land near the sea
• Description: A surname referencing low, deep waters.

Seaward

• Origin: English
• Meaning: Toward the deep sea
• Description: Directly references direction toward the ocean.

Pelagos

• Origin: Greek
• Meaning: The open deep sea
• Description: A surname derived from the Greek word for deep sea.

Vandermeer

• Origin: Dutch
• Meaning: From the sea/lake
• Description: A surname tied to deep waters.

Underwood

• Origin: English
• Meaning: Sometimes linked to “under the deep waters”
• Description: A nature-based surname with watery associations.

Aegirsson

• Origin: Norse
• Meaning: Son of the deep sea god Aegir
• Description: A patronymic surname tied to the ocean deity.

Doyle

• Origin: Irish
• Meaning: Dark stranger from the sea
• Description: A surname rooted in maritime mythology.

Murdoch

• Origin: Scottish
• Meaning: Protector of the sea
• Description: A strong surname with deep ocean ties.

Vanmeer

• Origin: Dutch
• Meaning: From the deep waters
• Description: A variant surname tied to the sea.

Seagrave

• Origin: English
• Meaning: Grave or deep place by the sea
• Description: A unique surname with oceanic depth meaning.

Fathom

• Origin: English
• Meaning: A unit measuring sea depth
• Description: A surname directly referencing deep sea measurement.

Seabrook

• Origin: English
• Meaning: Stream leading to deep sea
• Description: Combines water and ocean imagery.

Thalassinos

• Origin: Greek
• Meaning: Of the deep sea
• Description: A Greek surname derived from “thalassa.”

Pelagios

• Origin: Greek
• Meaning: Belonging to the deep sea
• Description: A surname with strong oceanic roots.

Maris

• Origin: Latin
• Meaning: Of the sea
• Description: Used as both first and last name.

Vandersee

• Origin: Dutch
• Meaning: From the sea
• Description: A surname tied directly to deep waters.

Seadon

• Origin: English
• Meaning: Hill near the deep sea
• Description: A geographic surname with ocean ties.

Pontano

• Origin: Italian
• Meaning: Of the deep sea
• Description: Derived from Latin “pontus.”

Seasholtz

• Origin: German-American
• Meaning: Forest by the deep sea
• Description: A blended surname with maritime roots.

Murdocksen

• Origin: Scottish/Scandinavian blend
• Meaning: Son of the sea protector
• Description: A patronymic surname tied to deep ocean guardianship.

Greek Names That Mean Deep Sea

Pontus

• Origin: Greek
• Meaning: The deep sea
• Description: A primordial deity personifying the deep sea.

Thalassa

• Origin: Greek
• Meaning: The sea / deep sea
• Description: Personification of the sea itself.

Nereus

• Origin: Greek
• Meaning: God of the deep sea
• Description: Father of the Nereids, deep sea nymphs.

Triton

• Origin: Greek
• Meaning: God of the deep sea
• Description: Messenger of the deep ocean.

Doris

• Origin: Greek
• Meaning: Gift of the deep sea
• Description: A sea goddess and Oceanid.

Galatea

• Origin: Greek
• Meaning: Goddess of calm seas
• Description: Known for her connection to deep waters.

Amphitrite

• Origin: Greek
• Meaning: Queen of the deep sea
• Description: Wife of Poseidon and ruler of ocean depths.

Oceanus

• Origin: Greek
• Meaning: God of the deep ocean
• Description: Personification of the world’s deep waters.

Pelagia

• Origin: Greek
• Meaning: Of the deep sea
• Description: Derived from “pelagos,” meaning open deep sea.

Naida

• Origin: Greek
• Meaning: Water nymph of the deep
• Description: A spirit associated with deep waters.

Halia

• Origin: Greek
• Meaning: Of the sea
• Description: A nymph connected to deep sea waters.

Leucothea

• Origin: Greek
• Meaning: White goddess of the sea
• Description: A protective deep sea deity.

Phorcys

• Origin: Greek
• Meaning: God of the deep sea
• Description: An ancient primordial sea god.

Ceto

• Origin: Greek
• Meaning: Sea monster of the deep
• Description: A goddess representing the dangers of deep waters.

Proteus

• Origin: Greek
• Meaning: Shape-shifting god of the deep sea
• Description: Known for living in the ocean’s depths.

Glaucus

• Origin: Greek
• Meaning: Sea god of the deep
• Description: A deity who gained immortality from the sea.

Eurybia

• Origin: Greek
• Meaning: Strength of the deep sea
• Description: A goddess associated with ocean power.

Tethys

• Origin: Greek
• Meaning: Goddess of the deep waters
• Description: A Titaness representing fresh and deep waters.

Benthos

• Origin: Greek
• Meaning: The deep sea floor
• Description: Refers to the deepest parts of the ocean.

Pelagios

• Origin: Greek
• Meaning: Belonging to the deep sea
• Description: A name reflecting deep ocean origin.

German Names That Mean Deep Sea

Meertief

• Origin: German (compound)
• Meaning: Deep sea
• Description: A literal compound name meaning “deep sea.”

Seetief

• Origin: German
• Meaning: Sea depth
• Description: Directly translates to the depth of the sea.

Marlow

• Origin: German/English
• Meaning: Lake/sea remnants, often linked to deep waters
• Description: A name with watery historical roots.

Meeresgrund

• Origin: German
• Meaning: Sea floor / deep sea bottom
• Description: Refers to the deepest part of the ocean.

Tiefsee

• Origin: German
• Meaning: Deep sea
• Description: A direct German term used poetically as a name.

Mara

• Origin: German variant
• Meaning: Sea
• Description: A soft name with oceanic ties.

Meerwald

• Origin: German
• Meaning: Sea forest, symbolizing deep underwater life
• Description: A nature-inspired name with sea depth meaning.

Seeland

• Origin: German
• Meaning: Land of deep waters
• Description: A geographic name tied to the sea.

Meerwin

• Origin: German
• Meaning: Friend of the deep sea
• Description: A warm name with oceanic connection.

Marlin

• Origin: German/English
• Meaning: Sea-dweller
• Description: Also a deep-sea fish name.

Meerlind

• Origin: German
• Meaning: Gentle deep sea
• Description: A soft, modern coined name.

Seetiefe

• Origin: German
• Meaning: The depth of the sea
• Description: A poetic term used as a name.

Marwin

• Origin: German
• Meaning: Friend from the sea
• Description: A traditional name with maritime roots.

Meerblau

• Origin: German
• Meaning: Deep blue sea
• Description: Reflects the deep blue color of the ocean.

Meerrose

• Origin: German
• Meaning: Rose of the deep sea
• Description: A floral-oceanic blended name.

Seemann

• Origin: German
• Meaning: Sea man / deep sea sailor
• Description: A surname-style name tied to the ocean.

Meerstern

• Origin: German
• Meaning: Star of the deep sea
• Description: A poetic, celestial-oceanic name.

Meerlicht

• Origin: German
• Meaning: Light of the deep sea
• Description: Suggests glowing deep ocean light.

Seewald

• Origin: German
• Meaning: Forest of the sea, symbolizing deep waters
• Description: A nature-rooted surname/first name.

Meerkind

• Origin: German
• Meaning: Child of the deep sea
• Description: A tender, modern coined name.