I am searching for descendants of Sigismund Grunewald (Grunwald) who lived in Vienna in the second half of the 19th century. He had at least 7 daughters. One of them, Leopoldine, married a Russian scientist Mikhail Yuzhakov an went to Irkutsk, Siberia. They had 4 children - Victor, Maria, Ljudmila, Nadezhda. The last is alive: she is my grandmother. Another Sigismunds daughter (Tauberg) as far as I know became a singer. The 'Russian' family was in contact with Austrians till the 2nd World War.