This is a list of surnames in which the categories include underwater.
ĆosićCroatian, Serbian From Croatian and Serbian ćosav"beardless", ultimately from Persian کوسه (kūseh) meaning "shark".
CreweEnglish Originally denoted someone from Crewe in Cheshire, which is from Welsh criu "weir, dam, fish trap".
ElyEnglish From the name of a town in eastern England meaning "eel district".
GillEnglish Originally indicated someone who lived near a ravine, from Middle English gil (of Old Norse origin).
KrebsGerman Means "crab" in German, perhaps a nickname for a person with a crab-like walk.
NicchiItalian From the Italian word nicchio meaning "shell", possibly a nickname for people related to the sea.
PollockScottish From the name of a place in Renfrewshire, Scotland, derived from a diminutive of Gaelic poll meaning "pool, pond, bog". A famous bearer was the American artist Jackson Pollock (1912-1956).
Van WierenFrisian, Dutch Means "from Wieren". This is the name of towns in Frisia and other parts of the Netherlands, which mean "seaweed".
VieiraPortuguese Denoted a person who came from a Portuguese town by this name, derived from vieria meaning "scallop". The scallop was a symbol of Saint James, and was traditionally worn by pilgrims to the shrine of Santiago de Compostela in Galicia.