Recorded 1880–2025 · United States
Llewellyn was most popular in 1918, when 79 American babies were given the name — ranking #1,487 that year. In 2025 it ranked #8,448, with 27 births. Across 1880–2025 the Social Security Administration has recorded 3,755 people named Llewellyn.
Across the whole record Llewellyn is mostly a boy’s name — 9.1% of the 3,755 Americans given it were girls and 90.9% were boys. In births since 2016 it is 32% girls and 68% boys.
Counted from every US birth the Social Security Administration recorded under this name, so it reflects use rather than opinion. A name given to fewer than five babies of one sex in a year is withheld at source and is not counted.
How much more common the name is in each state than across the country as a whole.
See Llewellyn on the interactive charts
Source: U.S.A. Social Security Administration. Years 1880–2025. namelegacy.org