Like River and Lake, a cool, refreshing modern water-related choice. 

Among the coolest of the cool color names, particularly popular with celebs as a unisex middle name. 

Blue

Brooke has long projected an aura of sleek sophistication, and can also be seen as a stylish water name.
 It was Brooke Shields (born Christa) who took it from quietly fashionable to ultra trendy when she was just a young girl; socialite Brooke (born Roberta Brooke) Astor gave it social status. 
 Brookes have appeared on soaps like The Bold and the Beautiful" and All My Children, and on Melrose Place and One Tree Hill.
Chynna Phillips and Billy Baldwin have a daughter named Brooke.

Brooke

This hyper-rhythmic name has two evocative references. In Greek mythology, she was an island nymph, a daughter of Atlas, who delayed Odysseus from returning home. It is also a genre of West Indian music, originating in Trinidad and Tobago and largely popularized in the States by Harry Belafonte. 
 Calypso was the name of Jacques-Yves Cousteau's research ship--and would make a highly dramatic, musical choice.

Calypso

It's a nature name evocative of rushing waterfalls. But also a dishwashing detergent. 

Cascade

One of the most romantic of appellations, Caspian is a geographical name referring to the large salty sea between Asia and Europe. It's also the name of the hero of C.S. Lewis's beloved Chronicles of Narnia, Prince Caspian. 
 
The name Caspian is ultimately derived from the Latin term Caspii, meaning "white." Caspii was the name of the people of Central Asia who were originally from Caucasus. 
 
Caspian is attracting a lot of attention from cutting-edge parents these days. It fits in with several trends as a name from classic children's literature, a water-related place name, and an ancient name with the trending Cas- beginning, ala Cassius and Cassian.

Caspian

First used during the Victorian craze for jewel names; it could rise again, along with Ruby and Pearl, though it doesn't have as much luster. 

Coral

Cordelia is exactly the kind of old-fashioned, grown-up name for girls that many parents are seeking for their daughters today. The name of King Lear's one sympathetic daughter, Cordelia has both style and substance along with its Shakespearean pedigree.
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Cordelia is a Nameberry favorite—Number 106 on the site—and it reentered the US Top 1000 in 2014 after a 60+ year absence. By 2016 it sank below that line again, must to the relief of many Cordelia fans who feared the name would get too popular.
 
If you're torn between Cordelia and the equally lovely Cora, you can always choose Cordelia for long and then call her Cora for short—or Delia, Lia, Del, or even the extremely different Cordie.
 Cordelia also appeared in Evelyn Waugh's Brideshead Revisited, Margaret Atwood's Cat's Eye, as detective Cordelia Gray in P.D. James's mystery novels, and was promoted by a character on both Buffy the Vampire Slayer and its spin-off Angel.
 And then there's that quote from the heroine of Anne of Green Gables: "I would love to be called Cordelia. It's such a perfectly elegant name."

Cordelia

Isla is a hit name throughout the English-speaking world but hasn't found the same popularity in other western countries, perhaps because its spelling and pronunciation don't make sense for those whose native language is not English. Think island without the final two letters.

Adding to the confusion, the name is a twin of the Spanish word for island, which is pronounced EES-la. Isla is part of a trend for simple, old-fashioned <a href="https://nameberry.com/girls-names">girls’ names</a> that start and end with a vowel: Ava, Ada, Ella, Emma, Eva, Ida, Ivy. 
 
Red-haired actress Isla Fisher, married to Sacha Baron Cohen, propelled the name to stardom. Isla Black Hitchens is a Harry Potter character; Queen Elizabeth has a great-granddaughter named Isla Elizabeth Phillips. 
Some other similar names that are not as trendy as Isla: Islay and Ailsa.

Isla

Kipper

The Play Misty for Me jokes will get old really fast. 

Misty

Gwyneth Paltrow and Chris Martin's choice of this white-bearded Old Testament name helped bring it into the modern age, along with brethren Elijah, Isaiah and Isaac. User-friendly nicknames include Moe and Mose.
 
The biblical story of Moses is, of course, one of the most familiar from the Old Testament -- Moses being found as a baby in the bulrushes, growing up to lead the Israelites out of Egyptian bondage and into the Promised Land, then bringing down the Ten Commandments from Mount Sinai. 
 
Moshe, as in Israeli statesman Dayan, is the original Hebrew form of the name. In Spanish, it is Moises, and in Yiddish, Moishe.
 
A namesake from the world of sports is NBA Hall of Famer Moses Malone. Mose Allison, meanwhile, is a jazz blues pianist and singer.

Moses

Ocean is a nature name that comes right out and states its meaning and association. Full of power and depth, Ocean is one of the fastest-rising baby names for both girls and boys, making the US Top 1000 for both genders in 2021. Oceane, the version that's trendy in France, was used for only 11 baby girls in the US in the same year.

Ocean-lovers who want to be less obvious can choose such subtler <a href="https://nameberry.com/list/641/names-that-mean-ocean">names that mean ocean</a> as Jennifer or Marissa, but coming right out and using Ocean is a perfectly valid way to go.

Ocean

Pearl, like Ruby, has begun to be polished up for a new generation of fashionable children after a century of jewelry box storage. The birthstone for the month of June, Pearl could also make a fresher middle name alternative to the overused Rose. Cool couple Maya Rudolph and Paul Thomas Anderson named their daughter Pearl Minnie, followed by Jack Osbourne, and several celebs have put it in the middle spot, as in Busy Philipps's Cricket Pearl, Jake Owen's Olive Pearl and Caleb Followill's Dixie Pearl .
After being a Top 25 name in the late nineteenth century, Pearl went into a long slide, but is showing signs of a strong comeback -- it reentered the Top 1000 in 2010.
 In Nathaniel Hawthorne's The Scarlet Letter, Pearl is the illegitimate daughter of Hester Prynne, who gives her the name because she is 'her mother's only treasure.'
 Pearl was also the alter ego name of Janis Joplin, tied to singer Pearl Bailey, and---hmm--the birth name of western writer Zane Gray.
 Variations are PERLE and PERLA.

Pearl

Modern surfer boy. Just don't call him Reefer. 

Reef

River shares the tranquil feeling of all the water names, and seems to have pretty much escaped its past strong association with River Phoenix and his unfortunate fate. Actor Joaquin Phoenix named his son with actress Rooney Mara after his brother River.

River's popularity is rising for boy genders, but it's still predominantly given to baby boys. Last year nearly 3500 boys were named River vs. about 1900 baby girls.

Keri Russell and the Taylor Hansons both have sons named River, Natasha Henstridge used it as the middle name of her boy Tristan, and Jason Schwartzman pluralized it for daughter Marlowe Rivers.

River

Sandie

Slate, Stone and Steel are on the rise, so why not Shale?

Shale

Until now, most girls called Shell used it as a nickname for Shelley or Michelle. Today's Shell is much more likely to be a nature name, cool and beachy, fit for all genders.

Shell

Shore

Wade has never been outside the US Top 1000 for boys - there's a reason for that. It has a clean spelling, fresh sound and is neither too trendy (unlike Kade or Cade) or too old-school (like Richard or Albert). We think Wade is a winning name.

Wade

sugarhit's list "Little Mermaids and Surf Stars - Water and Beach themed names!" of 21 great name ideas: Bay - Wade!

Little Mermaids and Surf Stars - Water and Beach themed names!

Water based names for your little beach baby!