Spelling Variants
Kai vs Kaia: Which Spelling?
Kai and Kaia share Hawaiian origin and similar meaning; Kaia is a variant spelling of Kai.
Global Rank #23
Kai
Origin: Frisian
Kai means "sea" or "ocean" and derives from Hawaiian, where it is rooted in Austronesian languages.
Global Rank #45
Kaia
Origin: Latin
Kaia means "sea" or "earth" and derives from Hawaiian linguistic roots, though it also has connections to Greek and Scandinavian languages where it relates to concepts of flow and nature.
Which is more popular? Based on real registry rankings, Kai currently ranks higher globally. Popularity can vary a lot by country — check each name's own page for a full regional breakdown.