In 2025, 65 US boys were named Cylas, making it the 2,188th most common boys’ name of the year, up 570 places from #2,758 in 2024. That is 18 more than the 47 boys named Cylas in 2024. Its best rank for boys was #1,898, reached in 2015. That year also had the most boys given the name: 77. For comparison, it was #1,898 in 2015 and unranked in 1950.
Social Security card records list Cylas in 27 years of the 146 from 1880 to 2025, starting in 1996 with 5 babies. In all, 1,034 US babies have been given the name, all of them boys. Its busiest decade was the 2010s, with 574 babies named Cylas.
Over the 10 years from 2016 to 2025, 513 US boys were named Cylas; the busiest of those years was 2025, with 65. In 2025 that was about 1 in 26,278 of the boys in SSA’s list for the year.
Among the states, Cylas ranked highest in Ohio in 2025, at #1,309 for boys there. It was not in the top 100 of any state. Related spellings in the SSA files include Silas (75,649 babies since 1880), Sylas (8,966 babies since 1880), Sylus (1,244 babies since 1880) and Sylis (1,043 babies since 1880). Rarer spellings such as Celes and Celys are summarised on this page.