Maria St. John-Mildmay (1790-1836) (1790–1836) Parents Sir Henry St John-Mildmay, 3rd Baronet Jane Mildmay Children Spencer Mildmay St. John Henry St John, 5th Viscount Bolingbroke, 6th Viscount St John Isabella Letitia St. John Emily Arabella Jane St. John Anne Jane Charlotte St. John Maria Louisa St. John Siblings Walter St. John-Mildmay Humphrey St John-Mildmay George William St. John-Mildmay John Francis St. John-Mildmay Sir Henry St John-Mildmay, 4th Baronet Jane St. John-Mildmay Edward St. John-Mildmay Paulet St. John Mildmay Judith St John-Mildmay Carew St. John Mildmay Partners Henry St John, 4th Viscount Bolingbroke, 5th Baron St John