Save Gender Feminine Usage Irish (Modern, Rare) Pronounced Pron. AY-deen, AY-djeen, ay-DEEN [key] Other Forms FormsAideen, Aydeen, Aodín, Eadaoin Meaning & History An Irish name meaning "little flame". It is derived from the name of the Celtic sun god "AED", with "ÍN" the diminutive for "little". It is a feminine version Aidan.It is commonly spelled with the anglicized form "Aideen".