Aidan or Aiden are the primary anglicization of the Irish given name Aodhán and the Scottish Gaelic given name Aodhàn. The name derives from “áed”, an Irish word of Indo-European origin, equivalent to “fire” in English. Aodh and its many variants are used today in the Irish and Scottish Gaelic languages as a given name for both sexes (though feminine forms are less varied and less common), and in even more variants as a family name. Aodh was the name of a Celtic god, twin of Fionnuala and son of Lir. The four Children of Lir are legendary in Celtic mythology and were commemorated on Celtic wedding rings. Lir’s second wife, Aoife, turned Aodh into a swan. Aodh was also the name of a Celtic sun god. The Celtic sun god Aodh is an aspect of the Celtic god The Dagda.