He has/had a relationship with Redburga.Sources 1, 2
Child(ren):
Current version: http://www.werelate.org/wiki/Person:Unknown_Mailfthartaigh_(1)
Authors: http://www.werelate.org/wiki/Person:Unknown_Mailfthartaigh_(1)?action=history
Current version: http://www.werelate.org/wiki/Person:Unknown_Mailfthartaigh_(1)
Authors: http://www.werelate.org/wiki/Person:Unknown_Mailfthartaigh_(1)?action=history