Mary Capel, Countess of Essex British countess (1679–1726) Parents Anne Villiers William Bentinck, 1st Earl of Portland Children William Capell, 3rd Earl of Essex Lady Elizabeth Diana Capell Lady Mary Capel Siblings Lady Frances Bentinck Isabella Bentinck Willem Bentinck Henry Bentinck, 1st Duke of Portland Lady Anna Margaretha Bentinck Lady Sophia Bentinck Lady Elizabeth Adriana Bentinck Lady Barbara Bentinck Lady Harriet Bentinck Willem Bentinck Charles John Bentinck Partners Conyers Darcy Algernon Capell, 2nd Earl of Essex
