Bertha Dorothea Rosentreter was born on 7 Dec 1869 in Węgorzewo, Węgorzewo County, Warmian-Masurian Voivodeship, Poland; died before 1979.
Bertha married Julius Franz Otto Ackermann on 20 Oct 1893 in Węgorzewo, Węgorzewo County, Warmian-Masurian Voivodeship, Poland. Julius was born on 15 Jul 1862; died before 1972. [Group Sheet] [Family Chart]