Cousin of S. Rankin Drew.
Father of writer/director Arthur Rankin Jr..
Half-brother of Dorothy Davenport, half-brother-in-law of Wallace Reid, half-uncle of Wallace Reid Jr.
Nephew of Lionel Barrymore and Doris Rankin, John Barrymore, Ethel Barrymore, and Gladys Rankin (Mrs. Sidney Drew) and Sidney Drew.
Son of stage actress Phyllis Rankin and adopted by her second husband, actor Harry Davenport; grandson of McKee Rankin.
Step-brother of Kate Davenport.
Wounded in World War I and consequently spent "a year and 18 days" in the hospital.