Viscounts Clare First holder Domhnall macConchobhair O'Brien, 1st viscount Clare Records #5 Holders Family filter On/Off 1 Domhnall macConchobhair O'Brien, 1st viscount Clare Charles O' Brien, 6th viscount Clare * 1699 Charles O' Brien, viscount Clare Connor O' Brien, viscount Clare Daniel O' Brien, viscount Clare Corrections and Updates To suggest a correction or an update. Click Here