Sir Philip died on 4 July 1937. As he was predeceased by both of his sons, he was succeeded in the baronetcy by the Rev. Sir Brooke de Malpas Egerton (later Grey-Egerton), his first cousin once removed, who was himself succeeded by Sir Philip Reginald le Belward Grey Egerton, 14th Baronet, his first cousin once removed. His widow, Lady Grey-Egerton died on 25 November 1958. Through his daughter Cecily, he was a grandfather to three grandchildren: Cynthia Mary Denise Prideaux-Brune (b. 1919), Philip Egerton Edmund Prideaux-Brune (b. 1921), and Rowland Denys Charles Prideaux-Brune (1925–2008).