Ancient Irish dynasties

thumb|Ulaid during the 10th–11th century and its three main sub-kingdoms, along with some of its neighbouring kingdoms. These boundaries would be used as the basis for the dioceses created in the 12th century. ' (Old Irish, ) or (Modern Irish, ) was a Gaelic over-kingdom in north-eastern Ireland during the Middle Ages made up of a confederation of dynastic groups. Alternative names include , which is the Latin form of , and ', Irish for 'the Fifth'. The king of Ulaid was called the or .

Cruthin kingdom

Irish clan

family name

Gaelic dynastic-grouping and territory

Irish chieftain

Polish-Irish family

Irish Gaelic clan

180px|thumb|A Defacement (flag)|defaced O'Rourke crest adorns the coat of arms of [[County Leitrim, their historic patrimony]] '''O'Rourke''' () was an Irish Gaelic clan based most prominently in what is today County Leitrim.

Irish clan based in County Donegal