The third son of General Sir Henry Hildyard, by his marriage to Annette, the daughter of Admiral James Charles Prevost, Hildyard's brothers were Harold Charles Thoroton Hildyard (born 1872) and Gerald Moresby Thoroton Hildyard (1874–1956).
Reginald VelJohnson | Reginald Heber | Reginald Punnett | Reginald Victor Jones | Reginald Rose | Reginald Robinson | Reginald Maudling | Reginald Farrer | Reginald Ernest Moreau | Reginald D. Hunter | The Fall and Rise of Reginald Perrin | George Reginald Starr | Reginald Manningham-Buller, 1st Viscount Dilhorne | Reginald Drax | Reginald De Koven | Reginald de Grey, 1st Baron Grey de Wilton | Reginald Bosanquet | Reginald | Sir Reginald Neville, 1st Baronet | Robert Hildyard | Reginald Warneford | Reginald Southey | Reginald Pecock | Reginald Marsh | Reginald Manningham-Buller | Reginald Kell | Reginald James Blewitt | Reginald Horace Blyth | Reginald Goodall | Reginald Garrigou-Lagrange |