Lord Robert Crichton-Stuart (1909-1976) (1909–1976) Parents Augusta Crichton-Stuart, Marchioness of Bute John Crichton-Stuart, 4th Marquess of Bute Children Ninian Crichton-Stuart Henry Crichton-Stuart Siblings Lord David Stuart John Crichton-Stuart, 5th Marquess of Bute Lady Jean Crichton-Stuart Lady Mary Crichton-Stuart Lord Rhidian Crichton-Stuart Lord Patrick Crichton-Stuart Partners Lady Janet Montgomerie