Unknown; possibly a modern variation of Kai or Keziah.
Kyza is a contemporary name with no established etymological history. It is likely a modern invention, potentially influenced by the Hawaiian name Kai, meaning 'sea', or a shortened, stylized version of the biblical Hebrew name Keziah. Its usage is extremely rare and follows modern trends of creating short, punchy names with the letter 'Z'.
US births per 5-year period, 1990–present (SSA data).