Aidan is a modern version of a number of Celtic language names, including the Irish male given name Aodhán, the Scottish Gaelic given name Aodhàn and the Welsh name Aeddan. Phonetic variants, such as spelled with an ‘e’ instead of an ‘a’, are appropriated and have not been prevalent until generations after the 19th century Irish Great Migration. The Irish language female equivalent is Aodhnait.
