Slavic and Croatian form of Lucas — from lucania; light. The most common boys' name in Croatia and Slovenia for much of the 2010s.
Luka ranks 85th among American boys in 2025, with 3,898 born that year. Its best year was 2025, when 3,898 babies were given the name, ranking 85th. The typical living American called Luka is about 5 years old today. It is relatively most common in Alaska, where it accounts for 0.36% of births.
Source: US Social Security Administration, national and state name files, 2025 release, and the Office for National Statistics for England and Wales. Etymology researched and written by our editors. Living-population and median-age figures are our own estimates, described in the methodology.