In 2025, 20 US boys were named Willian, making it the 5,033rd most common boys’ name of the year, up 851 places from #5,884 in 2024. That is 4 more than the 16 boys named Willian in 2024. Its best rank for boys was #601, reached in 1890. The most boys given the name in a single year was 84, in 1929. For comparison, it was #4,702 in 2015 and #1,085 in 1950.
Social Security card records list Willian in 137 years of the 146 from 1880 to 2025, starting in 1880 with 6 babies. In all, 4,092 US babies have been given the name, 0.4% of them girls and 99.5% boys. Its busiest decade was the 1920s, with 610 babies named Willian.
Over the 10 years from 2016 to 2025, 186 US boys were named Willian; the busiest of those years was 2018, with 27. In 2025 that was about 1 in 85,404 of the boys in SSA’s list for the year.
Rarer spellings such as Willine, Willean and Wilian are summarised on this page.