My grandfather PETER KEMPF was bn. in nyc. He had 3 sisters: Meta, Mae, and Anna.His parents were both born in germany in 1848-- their names were Valentine Kempf and Margarita Ross. Peter Married Dorthea Dunker. Peter and Dorthea both became deaf in childhood due to ilness. Dorthea had a sister named frieda Who married Herman Gerber. Any relatives out there?