Deep sea or coral
A modern phonetic elaboration of the name Chelsea, often interpreted as a portmanteau of 'shell' and 'sea'. While Chelsea originally refers to a 'chalk landing place' in Old English, this specific spelling emphasizes a connection to marine life and the ocean.
Less common today
Shellsea isn't in the latest US Top 1000. It last peaked at #7,421 in 1998.
US births per 5-year period, 1990–present (SSA data).
