My great-grandmaother Eva Catherine Rapp was born in New York around 1866. Her parents were Christopher Frederick Rapp and Veronica Kireher. She marries Gottlob Richard Kohlsdorf and lives in Brooklyn. Around 1888, both families (Rapp and Kohlsdorf) seem to be living in the Bushwick or Bed Sty sections of Brooklyn (around Broadway and Myrtle). Any leads on this Rapp family?