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.
About 11 boys were named Kyus in 2025.
US births per 5-year period, 1990–present (SSA data).
