Kai

unisexSeveral: Hawaiian

Kai is a unisex name of Several: Hawaiian, Scandinavian, Welsh origin, meaning “Sea (Hawaiian)”.

MeaningSea (Hawaiian)
GenderUnisex
OriginSeveral: Hawaiian, Scandinavian, Welsh
PronunciationKY
TraditionModern & Classic
Used inUnited States, Germany, United Kingdom, Worldwide

Meaning and origin of Kai

Kai has arisen independently in several languages. In Hawaiian kai means 'sea'. In Scandinavia and Germany it is an old name of uncertain origin, perhaps from forms of Gerhard or Nicolai, and in Welsh Cai is Sir Kay of the Arthurian legends. In Japanese, kai can be written with the character for 'sea'. Its short, international sound has made it popular around the world.

Is Kai a religious name?

Kai has no religious background; it is valued for its simple sound and its meanings across cultures.

How popular is Kai?

Popular in many countries, mostly for boys though also used for girls.

Gifts with the name Kai

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Spellings and variants of Kai

KyeCaiKayKaj

Names similar to Kai

KianLeoMiloRio

More unisex names

Frequently asked questions

What does the name Kai mean?

Kai means 'Sea (Hawaiian)'. It is of Several: Hawaiian, Scandinavian, Welsh origin.

Does Kai have a religious meaning?

Kai has no religious background; it is valued for its simple sound and its meanings across cultures.

How do you pronounce Kai?

Kai is pronounced KY.

Is Kai a boy or girl name?

Kai is used for both boys and girls.

Updated October 2026. Spotted a mistake? Tell us.