Am looking for names of my 2xgreat grandmother's parents. Gran, Wilhelmina F. Kornmann was born in 1843 in New York. Her sister, Josephine married Professor Theodore Gehrig and lived in Poughkeepsie. He was a music professor. Sister Mary married John Grete and settled in Silver City Idaho, as did Wilhelmina, who married Fred Grete. Any information would be appreciated.