Killion is a very rare variant of Killian that peaked in 2017 and has grown less common since.
Killion is a boy name. In 2025 it ranked #11,403 for boy births in the United States (and #23,484 across all names), given to 6 babies. Killion was first reported in SSA data in 2009 and peaked in 2017 (9 births).
Boys named Killion per year · hover for count and boys rank · Source: U.S. Social Security Administration, national data 2009–2025 · 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