In 2025, 448 US boys were named Kylian, making it the 624th most common boys’ name of the year, down 164 places from #460 in 2024. That is 233 fewer than the 681 boys named Kylian in 2024. Its best rank for boys was #346, reached in 2023. That year also had the most boys given the name: 950. For comparison, it was #6,906 in 2015 and unranked in 1950.
Social Security card records list Kylian in 21 years of the 146 from 1880 to 2025, starting in 2002 with 7 babies. In all, 3,750 US babies have been given the name, 0.3% of them girls and 99.6% boys. Its busiest decade was the 2020s, with 3,173 babies named Kylian.
Over the 10 years from 2016 to 2025, 3,655 US boys were named Kylian; the busiest of those years was 2023, with 950. In 2025 that was about 1 in 3,813 of the boys in SSA’s list for the year.
Among the states, Kylian ranked highest in Florida in 2025, at #400 for boys there. It was not in the top 100 of any state. Related spellings in the SSA files include Killian (16,834 babies since 1880), Cillian (4,090 babies since 1880), Kylan (11,821 babies since 1880) and Kellan (11,269 babies since 1880). Rarer spellings such as Kylieann and Kylianne are summarised on this page.