Kilyn is a very rare name used for both girls and boys that peaked in 2009 and has since faded.
Kilyn is predominantly a girl name. In 2025 it ranked #16,180 for girl births in the United States (and #26,842 across all names), given to 5 babies. Kilyn was first reported in SSA data in 2001 and peaked in 2009 (11 births).
Girls named Kilyn 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
Boys named Kilyn
Boys named Kilyn 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