Unknown; possibly a modern variation of Caius or Kai.
Kyus is a rare modern name with an unclear etymology. It is likely a creative phonetic spelling or a variation of the Latin name Caius, meaning 'rejoice', or influenced by the Hawaiian name Kai. Its usage in the United States is extremely limited, often chosen for its unique sound and contemporary feel.
US births per 5-year period, 1990–present (SSA data).
