Fewer than five US girls were named Catelyn in 2025, so it does not appear in that year’s SSA list for girls. Its best rank for girls was #1,873, reached in 2000. The most girls given the name in a single year was 108, in 2006. For comparison, it was #3,359 in 2015 and unranked in 1950.
Social Security card records list Catelyn in 39 years of the 146 from 1880 to 2025, starting in 1985 with 24 babies. In all, 2,294 US babies have been given the name, all of them girls. Its busiest decade was the 2000s, with 918 babies named Catelyn.
Over the 10 years from 2016 to 2025, 133 US girls were named Catelyn; the busiest of those years was 2017, with 29.
Related spellings in the SSA files include Katelyn (134,206 babies since 1880), Katelynn (30,691 babies since 1880), Katelin (8,917 babies since 1880) and Katilyn (1,738 babies since 1880). Rarer spellings such as Caitylyn and Caitilyn are summarised on this page.