Arthur married Harriet Ashton, with whom he had two daughters: Elinor Gertrude (1886–1979) and Elizabeth (Bessie, 1888–1977). His wife died shortly after giving birth to Bessie. Their second cousin, Beatrix Potter, sent them her own hand-drawn watercolour Christmas cards; examples from 1890 to 1895 have survived. In 1908, Elinor Lupton was awarded an M.A. from Cambridge University. Both sisters served as V.A.D. nurses in France during the Great War. Their brother Arthur survived the war but a riding accident with the Bramham Moor Hunt in 1928 resulted in his death the following year.
