Fewer than five US girls were named Kathryne in 2025, so it does not appear in that year’s SSA list for girls. Its best rank for girls was #564, reached in 1886. The most girls given the name in a single year was 117, in 1990. For comparison, it was #9,807 in 2015 and #1,237 in 1950.
Social Security card records list Kathryne in 145 years of the 146 from 1880 to 2025, starting in 1880 with 6 babies. In all, 5,959 US babies have been given the name, all of them girls. Its busiest decade was the 1910s, with 729 babies named Kathryne.
Over the 10 years from 2016 to 2025, 83 US girls were named Kathryne; the busiest of those years was 2017, with 15.
Related spellings in the SSA files include Katherine (652,750 babies since 1880), Kathryn (456,515 babies since 1880), Cathryn (16,332 babies since 1880) and Kathrine (15,775 babies since 1880).