derived from several Old and Middle English words; also adopted by immigrants whose surnames began with a K.
A male given name from Welsh derived from the surnames, or from a rare medieval given name (as the Sir Kay of Arthurian legend), Welsh Cai, Latinized as Caius, related to the modern male name Kai.
A short form of Katherine and other female names beginning with a "K"; popular as a middle name.
Modern English dictionary
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