Carl Gustav Schmitt and Georg Alois Schmitt were brothers, both born into the musical family of Aloys Schmitt in Germany. The article notes that each was a son of Aloys Schmitt, making them siblings connected through their shared parentage and early musical upbringing.
Their relationship is rooted in a common musical heritage, as both were trained by their father and pursued careers as composers, performers, and educators. Although their professional paths later diverged, with Georg remaining in Europe and Carl Gustav building his career in Australia and New Zealand, they share a familial and artistic connection shaped by their early life and education.