In 2025, 6 US boys were named Kaelin, making it the 11,312th most common boys’ name of the year. Its best rank for boys was #1,010, reached in 1995. That year also had the most boys given the name: 121. For comparison, it was #9,148 in 2015 and unranked in 1950.
In 2025, 5 US girls were named Kaelin, making it the 16,016th most common girls’ name of the year. Its best rank for girls was #1,111, reached in 1995. The most girls given the name in a single year was 196, in 2005. For comparison, it was #4,105 in 2015 and unranked in 1950.
Social Security card records list Kaelin in 44 years of the 146 from 1880 to 2025, starting in 1981 with 13 babies. In all, 3,663 US babies have been given the name, 75% of them girls and 25% boys. Its busiest decade was the 2000s, with 1,560 babies named Kaelin.
Over the 10 years from 2016 to 2025, 93 US boys were named Kaelin; the busiest of those years was 2018, with 16. In 2025 that was about 1 in 284,679 of the boys in SSA’s list for the year.
Related spellings in the SSA files include Kaylin (19,934 babies since 1880), Kaelyn (15,648 babies since 1880), Kailyn (14,351 babies since 1880) and Kaylyn (12,091 babies since 1880).