Frances Villiers, Countess of Jersey his "wife", Maria Fitzherbert, with whom he had undergone a form of marriage in a clandestine Church of England ceremony that all parties to it knew was invalid under the Royal Marriages Act 1772. Having encouraged the Prince of Wales to marry his first cousin, Caroline of Brunswick in 1794, Lady Jersey nevertheless set out to make Caroline's life difficult. However, the now Princess of Wales (Caroline) had very little regard for George IV, nor he for her, and after the birth of their child, they lived apart during their twenty-five year marriage, leaving a void Frances and other mistresses,
Katherine Villiers, Duchess of Buckingham his first wife, Frances Knyvet (d. before 26 November 1605), widow of Sir William Bevill of Killigarth or Kilkhampton, Cornwall, and third daughter and coheir of Sir Henry Knyvet of Charlton, Wiltshire, by Elizabeth Stumpe, the daughter of Sir James Stumpe of Bromham, Wiltshire. Katherine Manners was selected by the formidably ambitious Mary Villiers, Countess of Buckingham, to marry her son, George Villiers. However, Manners was a strict Roman Catholic, and the King refused to allow Villiers to marry her (almost the only occasion when he did not give the Villiers family whatever they asked for). In addition to this,