Charles O'Conor (historian)

Charles O'Conor, RIA (Irish: Cathal Ó Conchubhair; 1 January 1710 – 1 July 1791), also known as Charles O'Conor of Belanagare, was a member of the Gaelic nobility of Ireland and antiquarian who was enormously influential as a protagonist for the preservation of Irish culture and Irish mythology during the 18th century. He combined an encyclopaedic knowledge of Irish manuscripts and Gaelic culture in demolishing many specious theories and suppositions concerning Irish history.

Source: Wikipedia — Charles O'Conor (historian) (CC BY-SA 4.0)