His older brother, Francis Edward Bache, was a composer and organist, while his sister, Constance Bache, was a composer, pianist and teacher who would write a joint biography of both brothers under the title Brother Musicians.
O seu irmán maior, Francis Edward Bache, foi compositor e organista, mentres que a súa irmá, Constance Bache, foi compositora, pianista e profesora e, posteriormente, escribiu a biografía conxunta de ambos os irmáns co título Brother Musicians (Irmáns músicos).