Eirian is a name of Welsh origin. Notable people with this name include:
Given name
Eirian Jones, New Zealand phytopathologist Eirian Llwyd (1951–2014), Welsh artist Eirian Smith (born 1998), American acrobatic gymnast Eirian Williams (born 1955), Welsh snooker referee
Middle name James Eirian Davies (1918–1998), Welsh poet Jennie Eirian Davies (1925–1982), Welsh politician Sian Eirian Rees Davies (born 1981), Welsh writer