The O'Dohertys of Inishowen
The Annals of Ulster recorded Domnall Ua Dochartaigh in 1339 as arch-chief of Inishowen, with "little wanting from his having the lordship of Inis-Eogain." The O'Doherty clan controlled the entire peninsula—a territory of strategic and political weight, ringed by water, commanding trade and military access. From their strongholds they maintained Gaelic law and culture through centuries when Norman influence spread elsewhere. That rule ended with the Plantation in the 17th century, but the names and the ringforts remain.