Mary Heathcote (died 1812) (1726–1812) Parents Lady Elizabeth Parker Sir William Heathcote, 1st Baronet Children Thomas Parker, 5th Earl of Macclesfield George Parker, 4th Earl of Macclesfield Lady Elizabeth Parker Siblings Elizabeth Heathcote Henry Heathcote Thomas Heathcote Partners Thomas Parker, 3rd Earl of Macclesfield