1) (a Sept seated at Muintir-Duibhidhir, a district in the present Barony of Kilnamanagh, co. Tipperary, deriving their name from Duibhidhir, Chief of the Sept. The Four Masters record that Thomas O’Dwyer, son of Conor, son of Thomas O’Dwyer, of Ormonde, was slain by the O'Kennedys, 1473). (Cadiz, in Spain; allowed by Hawkins, Ulster, 1776, to Anthony O’Dwyer, of that place, son of Dermot O’Dwyer, Captain of Grenadiers in the Irish Brigade in the service of Spain, who was fourth in descent from Edmond O’Dwyer, second son of Anthony O’Dwyer, of Kilnamanagh, Chief of the Sept, 1567). (Clonyhorpa, co. Tipperary, Fun. Ent. Ulster’s Office, 1629, Darry O’Dwyer, Esq., of that place.) Ar. a lion ramp. gu. betw. three erm. spots. Crest—A hand couped at the wrist and erect, grasping a sword all ppr. Motto—Virtus sola nobilitas.
2) (Drumdromy, co. Tipperary; Fun. Ent. Ulster's Office, 1627, John O’Dwyer, Esq., of that place). Same Arms, a crescent for diff.