2,751 Tiernan members around the world
Stay informed about Tiernan Family online & offline events!
See one of our recent Ireland101 Tribe Gatherings
Tiernan Family HistoryRecorded as O'Tiernan, MacTiernan, McTiernan, and Tiernan, this notable surname is Irish. It derives from the Old Gaelic name MacTighearnain, meaning the son of Tierna, a name meaning lord or master. Traditionally, Irish family names are taken from the heads of tribes, revered elders, or some illustrious warrior, and are usually prefixed by "Mac", denoting "son of", or "O", grandson, male descendant of. Two separate septs of MacTiernan arose independently in Ireland, the first belonged to the Ulster county of Cavan, and were a branch of the great O'Rourkes, styled Lords of Breffny, whose chieftains ruled territory in Counties Cavan and Leitrim...
Who have we missed?
Tell us about any famous Tiernan (or surname variant) you think we should add here. We will get our genealogists to check them out and add them to the list. Thanks!
Join the conversation with the Tiernan tribe
- Find your Tiernan ancestor
- Tell us about your Tiernan Family
- Tell us about your Tiernan ancestors
- Ask a question about the Tiernan history
- Leave a message for Tiernan family members
Areas of Origin for Tiernan
Invite more Tiernan family members!
Write an email address and click 'Invite' to share this page with more members of the Tiernan tribe.
Family Coat of Arms Generator
Why not see what your family crest could look like based on your own family characteristics?Create Crest