Dorothy Marie Isolde Sheffield (1878-1964) (1878–1964) Parents Priscilla Isabel Laura Dumaresq Sir Robert Sheffield, 5th Baronet Children Gerald Portman, 8th Viscount Portman Penelope Isobel Portman Michael Berkeley Portman Siblings Gwendoline Sophia Alice Sheffield Berkeley Sheffield Helen Sheffield Partners Gerald Portman, 7th Viscount Portman