Kaii is a very rare variant of Kai that peaked in 2019 and remains in steady use.
Kaii is predominantly a boy name. In 2025 it ranked #8,577 for boy births in the United States (and #17,782 across all names), given to 9 babies. Kaii was first reported in SSA data in 2001 and peaked in 2023 (17 births).
Boys named Kaii per year · hover for count and boys rank · Source: U.S. Social Security Administration, national data 2001–2025 · U.S.+territories from SSA territory files (1998–2025) · SSA publishes a name only in years it was given to at least 5 babies, so a name may have been in use before — or between — the years shown here
Girls named Kaii
Girls named Kaii per year · hover for count and girls rank · Source: U.S. Social Security Administration, national data 2001–2025 · U.S.+territories from SSA territory files (1998–2025) · SSA publishes a name only in years it was given to at least 5 babies, so a name may have been in use before — or between — the years shown here