- Ludwig Elias Quittner (1858-1922). Husband.
- Leopoldine Quittner-Mahler (1863-1889). Wife.
- Otto Mahler (1873-1895). Brother of Gustav and Leopoldine.
26-08-1889 Gustav Mahler wrote his mother about his sister going to a doctor.
Leopoldine died a month after Mahlers letter on 27-09-1889.
Otto Mahler (1873-1895) also lived here. After Leopoldine Quittner-Mahler (1863-1889)‘s death he moved to Friedrich Fritz Lohr (1859-1924) in the Breitegasse No. 4 where Otto lived in courtyard rooms. See 1890-1902 House Gustav Mahler Vienna – Breitegasse No. 4.