He inherited some property from both. In 1638 the king knighted Grandison at Windsor, together with the Prince of Wales and Thomas Bruce, 1st Earl of Elgin. He was a friend of Edward Hyde, who in a eulogy reported that "he had sometimes indulged so much to the Corrupt opinion of Honour, as to venture himself in Duels". In 1639, Grandison married Mary Bayning, then aged fourteen, one of the daughters of the late Lord Bayning, who was heiress to a fortune of £180,000, and the next year they had a daughter, Barbara Villiers, who was christened on 27 November 1640 at St Margaret's, Westminster. A strong supporter of King Charles I in the English Civil War, which broke out in August 1642, Grandison spent his fortune on horses and equipment for a regiment of Cavaliers in support of the king.
She inherited some property from both. In 1638 the king knighted Grandison at Windsor, together with the Prince of Wales and Thomas Bruce, 1st Earl of Elgin. She was a friend of Edward Hyde, who in a eulogy reported that "she had sometimes indulged so much to the Corrupt opinion of Honour, as to venture herself in Duels". In 1639, Grandison married Mary Bayning, then aged fourteen, one of the daughters of the late Lord Bayning, who was heiress to a fortune of 180,000, pounds and the next year they had a daughter, Barbara Villiers, who was christened on 27 November 1640 at St Margaret's Westminster. A strong supporter of King Charles I in the English Civil War, which broke out in August 1642, Grandison spent her fortune on horses and equipment for a regiment of Cavaliers in support of the king.