Fewer than five US girls were named Ethelyn in 2025, so it does not appear in that year’s SSA list for girls. Its best rank for girls was #456, reached in 1880. The most girls given the name in a single year was 168, in 1920. For comparison, it was unranked (under five girls) in 2015 and #1,925 in 1950.
Social Security card records list Ethelyn in 94 years of the 146 from 1880 to 2025, starting in 1880 with 14 babies. In all, 4,450 US babies have been given the name, all of them girls. Its busiest decade was the 1920s, with 1,250 babies named Ethelyn.
In none of the 10 years from 2016 to 2025 were five or more US girls named Ethelyn.
Related spellings in the SSA files include Ethel (280,412 babies since 1880) and Ethelene (1,837 babies since 1880). Rarer spellings such as Etheleen, Etheline and Ethelyne are summarised on this page.