Anne O'Brien, 2nd Countess of Orkney Scottish noble (1696–1756) Parents Elizabeth Hamilton, Countess of Orkney George Hamilton, 1st Earl of Orkney Children Mary O'Brien, 3rd Countess of Orkney William O'Brien Augustus O'Brien George O'Brien Murrough O'Brien Siblings Frances Lumley-Saunderson, Countess of Scarbrough Lady Henrietta Hamilton Partners William O'Brien, 4th Earl of Inchiquin