As a Japanese name, Umina derives from umi, meaning "sea", combined with a range of other kanji characters.

A perfectly fine Anglo surname, though we'd prefer Keaton. Oscar-winning writer-director George Seaton (Miracle on 34th Street, The Country Girl) was actually born George Stenius. 

Hurley is a possibility as a unisex surname-name ending with the "lee" sound. It is perhaps most associated with British actress Elizabeth Hurley, and is much rarer than Harley, because the "ur" sound is currently out of fashion (and the word "hurl" may put some off).

Sprightly name popular in Israel with beachy meaning and international flex.

This Roman mythology (and planet) name would be very hard to handle. It derives from a root meaning cloud.

The name of the resort city on Spain's Costa del Sol is pronounced mar-BAY-a, setting it apart from the bella-name competition -- though many English speakers won't realize that. And it probably doesn't matter unless you pointedly want to reference the place via your daughter's name. Marbella, with the Ls pronounced, is a pretty choice given to about 100 baby girls each year.

Derived from Maria, the meaning of which is uncertain. Theories include "drop of the sea" (from Hebrew roots mar "drop" and yam "sea"); "bitter" (from Hebrew marah "bitterness"); and "beloved" (from the Egyptian root mr).

The Spanish and Portuguese word for "sea" is a Top 100 name in Spain. In America, it's sometimes used as a nickname for names like Martina and Marina, but it could also plausibly stand on its own.

Cross-cultural name with a great nautical meaning. It boomed in the 1930s and has potential for revival now.

This Hawaiian name gracefully celebrates the force of nature, paying tribute to the ocean. If you're looking for unique names that mean ocean, this should be on your short list.

Upbeat name that cheers you as soon as you hear it. One famous bearer is Maori feminist Meri Te Tai Mangakāhia.

How to spruce up Fisher or Beau? This French surname-name might be an option for a parent unafraid of the unusual. The name derives from Barbel, a type of fish, which is how it became a surname for some fishermen.

Variant of Marianne or Maryann

In Slovenia, Maca is more common as an independent name than its parent name Marija.

The Greek god Triton was the messenger of the sea and the son of sea god Neptune. He is usually represented as a merman, the the head and upper body of a human and the lower body of a sea creature. In The Little Mermaid he is the father of Ariel.

Friendly Slavic rarity.

A striking form of international favourite Maria, the meaning of which is uncertain. Theories include "drop of the sea" (from Hebrew roots mar "drop" and yam "sea"); "bitter" (from Hebrew marah "bitterness"); and "beloved" (from the Egyptian root mr).

A fresh and summery — if rather long — color that sounds namelike, but is extremely rarely used.

Pania is a possible alternative to Tania, if you want to go the New Zealand rather than Russian route.

An unusual place name with a sea-inspired meaning, Embrun is a commune in the southeast of France, as well as a town in Ontario, Canada. Sometimes known as the "Nice of the Alpes", Embrun could get its name from an Occitan and French word meaning "seaspray".