Fewer than five US girls were named Ka in 2025, so it does not appear in that year’s SSA list for girls. Its best rank for girls was #2,060, reached in 1990. That year also had the most girls given the name: 65. For comparison, it was unranked (under five girls) in 2015 and unranked in 1950.
Fewer than five US boys were named Ka in 2025, so it does not appear in that year’s SSA list for boys. Its best rank for boys was #4,764, reached in 1984. The most boys given the name in a single year was 10, in 1990. For comparison, it was unranked (under five boys) in 2015 and unranked in 1950.
Social Security card records list Ka in 30 years of the 146 from 1880 to 2025, starting in 1962 with 5 babies. In all, 917 US babies have been given the name, 85% of them girls and 15% boys. Its busiest decade was the 1990s, with 426 babies named Ka.
In none of the 10 years from 2016 to 2025 were five or more US girls named Ka.
Related spellings in the SSA files include Kay (102,545 babies since 1880), Kai (78,710 babies since 1880), Kaia (20,967 babies since 1880) and Kaye (13,707 babies since 1880).