Benson was born in Alresford, Hampshire, the fourth son of William Benson, a barrister, and Elizabeth Soulsby Smith. The actor-manager Sir Frank Benson and the designer William Arthur Smith Benson were his brothers.
Benson was born in Alresford, Hampshire, the fourth son of William Benson, a barrister, and Elizabeth Soulsby Smith. The actor-manager Sir Frank Benson and the designer William Arthur Smith Benson were his brothers.