Fagan, Fegan
Fagan, Fegan—In the district of Armagh the name Feighan has been changed to Fagan in some cases. Fagan is of a different origin. Feighan in Gaelic is O'Fiacháin.
Alphabetical Index of Anglicised Surnames in Ireland
See also Woulfe’s Irish Names and Surnames
… and O'Hart's Irish Pedigrees