Magdalena Langenacker Seider/Knebl was born in 1885 to Nikolaus and Julianna Langenacker in Miletitsch, Austria-Hungary. She married Franz Seider in 1903 and he died in 1904. They had one daughter Theresia. In 1907 she married Andreas Knebl who died in Miletitsch in 1944. They had a daughter, Magdalena Knebl in 1908. Magdalena Seider/Knebl died in the Gakowa Concentration Camp.