Killiam is a very rare boys' name that peaked in 2024 and has grown less common since.
Killiam is a boy name. In 2025 it ranked #9,348 for boy births in the United States (and #19,298 across all names), given to 8 babies. Killiam first appears in 2017 and peaked in 2024 (16 births).
Boys named Killiam per year · hover for count and boys rank · Source: U.S. Social Security Administration, national data 2017–2025 · U.S.+territories from SSA territory files (1998–2025)