Fannon

The roots of the Fannon surname in Ireland are somewhat unclear; it seems that the name was both native Irish Gaelic, and Norman. The Gaelic name ó Fionnáin seems to be derived from Gaelic word "fionn," which means "fair," and has been Anglicized as "Finan" and "Fanning," both of which are Norman names that came to Ireland in the 12th century.