 Their brothers were the bass Thomas Aynsley Cook (1833–1894) and the baritone John Furneaux Cook, and their sister, Alice Aynsley Cook (c. 1850–1938), was also an opera singer and musical comedy actress.His niece, Annie, married Eugene Goossens, Jr. Lutz
also had a son, Caspar, who became a clergyman.In printed works, such as scores and theatre programmes, Lutz was usually credited simply as Meyer Lutz.