Irena Biermannova with her family

This is a photograph of Maximilian Biermann's family. He is the first on the left. His wife Irena was my mother's sister. The picture was taken in Topolcany in the 1920s. One of my mother's sisters was Irena Biermannova. All I know about her is that she had four children. I remember only three of them, two daughters, Ruzena and Magdalena, and one son, Maximilian. They all likely died during World War II.