Cay

The name Cay has a somewhat obscure origin, primarily associated with Cornish and Welsh traditions. In Cornish, it is believed to be a short form of names like Cai or Cayo, which themselves have connections to the Arthurian legend. Cai (or Kay) was one of King Arthur's knights, known for his loyalty and sometimes his sharp tongue. The name's meaning 'rejoice' or 'fiery' adds to its spirited character.

While less common as a standalone name, Cay also appears as a diminutive or nickname in various cultures. Its simplicity and single syllable make it adaptable. In some contexts, it might be a phonetic spelling of the letter 'K' or a short form of names beginning with 'Cai-' or 'Kai-'. Its usage as a unisex name is relatively modern, likely stemming from its brevity and pleasant sound.