Xi is a very rare name used for both girls and boys that peaked in 2019 and remains in steady use.
Xi is predominantly a boy name. In 2025 it ranked #9,668 for boy births in the United States (and #19,946 across all names), given to 8 babies. Xi was first reported in SSA data in 2014 and peaked in 2019 (10 births).
Boys named Xi per year · hover for count and boys rank · Source: U.S. Social Security Administration, national data 2014–2025 · 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 Xi
Girls named Xi per year · hover for count and girls rank · Source: U.S. Social Security Administration, national data 2014–2025 · 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