Origin: Scottish, Irish. On the western coast of Scotland and on the Hebrides islands the McFadden family was born among the ancient Dalriadan clans. Their name comes from the personal name Paidean. The Gaelic forms of the surname are Mac Phadein or Mac Phaidin, both of which mean son of Paidean. First found in Kintyre, where they were seated from very ancient times, some say well before the Norman Conquest and the arrival of Duke William at Hastings in 1066 A.D.
Spelling variations include: McFadden, McFadyen, Fadden, Fadyen, Faden, McFadin, Fadin, McFadwyn, Fadwyn, McFadyean, McFadyon, McFayden, Feyden and many more.