Aneurin may refer to:
- Aneurin, an alternative name for thiamine (vitamin B<sub>1</sub>)
<!--Aneurin, ; , is a Welsh male given name of unknown origin, possibly from the Latin , meaning honour. The name dates back to the 17th century when it appeared as an alternative spelling or misspelling of the name of the medieval Brittonic poet, Aneirin, (originally Neirin).-->
- Aneurin Barnard (born 1987), Welsh actor
- Aneurin Bevan (1897–1960), Welsh politician
- Aneurin Donald, Welsh cricketer
- Aneurin Hughes (1937–2020), British diplomat
- Aneurin Jones (1930–2017), Welsh artist
- Aneurin Livermore, Welsh footballer
- Aneurin Norman, Welsh cricketer
- Aneurin Owen (disambiguation)
- Aneurin Rees, Welsh rugby union player
- Aneurin Richards, Welsh footballer
- Aneurin Williams, British Liberal Party politician
- Iolo Aneurin Williams, British writer, journalist and Liberal Party politician
- John Aneurin Grey Griffith, Welsh legal scholar
See also
- Aneirin, a 6th- or 7th-century Brythonic bard
- Saint Aneurin