In 2025, 97 US boys were named Caelum, making it the 1,690th most common boys’ name of the year, up 343 places from #2,033 in 2024. That is 22 more than the 75 boys named Caelum in 2024. Its best rank for boys was #1,690, reached in this year, 2025. That year also had the most boys given the name: 97. For comparison, it was #3,799 in 2015 and unranked in 1950.
Social Security card records list Caelum in 28 years of the 146 from 1880 to 2025, starting in 1995 with 5 babies. In all, 928 US babies have been given the name, all of them boys. Its busiest decade was the 2020s, with 430 babies named Caelum.
Over the 10 years from 2016 to 2025, 659 US boys were named Caelum; the busiest of those years was 2025, with 97. In 2025 that was about 1 in 17,609 of the boys in SSA’s list for the year.
Among the states, Caelum ranked highest in Virginia in 2025, at #809 for boys there. It was not in the top 100 of any state. Related spellings in the SSA files include Callum (16,089 babies since 1880), Calum (3,506 babies since 1880) and Kallum (697 babies since 1880). Rarer spellings such as Kaelem are summarised on this page.