for the names of eight children. Of course, you should do your own research to verify that these are your ancestors, but this may be a start.
See US Census 1900 Iowa, Sac, Boyer Valley - Lundwig Weiner (they messed that up, didn't they!) and wife Martha (married abt 1872 vs 1864). It says they immigrated to the US in 1892 and that Ludwig is a citizen. Check for his papers.