William Douglas, 10th Earl of Angus Earl of Angus (1552-1611) (1552–1611) Parents Egidia Graham William Douglas, 9th Earl of Angus Children Lady Mary Douglas William Douglas, 1st Marquess of Douglas Lady Catherine Douglas James Douglas, 1st Lord Mordington Lady Elizabeth Douglas Sir Francis Douglas Siblings Gavin Douglas John Douglas Lady Sarah Douglas Lady Margaret Douglas Sir Robert Douglas, 3rd of Glenbervie Lady Jean Douglas Partners Elizabeth Oliphant
