Lock is a very rare boys' name that peaked in 1915 and has grown less common since.
Lock is a boy name. In 2025 it ranked #13,151 for boy births in the United States (and #27,043 across all names), given to 5 babies. Lock first appears in 1915 and peaked in 1915 (6 births).
Boys named Lock per year · hover for count and boys rank · Source: U.S. Social Security Administration, national data 1915–2025 · U.S.+territories from SSA territory files (1998–2025)