Daniel O'Brien, 3rd Viscount Clare Irish army officer (1630–1690) Parents Honora O'Brien Connor O'Brien, 2nd Viscount Clare Children Charles O'Brien, 5th Viscount Clare Daniel O'Brien, 4th Viscount Clare Siblings Margaret O'Brien Mary O'Brien Sarah O'Brien Honora O'Brien Catherine O'Brien Ellen O'Brien Partners Philadelphia Lennard