Kallahan is a very rare name used for both girls and boys that peaked in 2025 and remains in steady use.
Kallahan is predominantly a boy name. In 2025 it ranked #3,163 among boys (38) and #16,052 among girls (5) — overall #6,245 across all names. The charts below show girls and boys separately.
Boys named Kallahan 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)
Girls named Kallahan · 5 in 2025
Girls named Kallahan per year · hover for count and girls rank · Source: U.S. Social Security Administration, national data 2017–2025 · U.S.+territories from SSA territory files (1998–2025)