Orpen, G. H. (1930). The Orpen family: Being an account of the life and writings of Richard Orpen of Killowen, Co. Kerry, together with some researches into his forbears in England, and brief notices of the various branches of the Orpen family descended from him. Printed for private circulation by Butler & Tanner, Ltd..

Orpen, Goddard Henry. The Orpen Family: Being an Account of the Life and Writings of Richard Orpen of Killowen, Co. Kerry, Together with Some Researches into His Forbears in England, and Brief Notices of the Various Branches of the Orpen Family Descended from Him. Printed for private circulation by Butler & Tanner, Ltd., 1930.