My son has traced our family back to 1634 in Darmstadt, Germany. Jacob and Barbara migrated to Maryland in 1830s with several children. Kaff.. became Koff.. at that time however in at least one US census it is spelled Coff..We have located two off-shoots of the family in Pennsylvania and Delaware. I have info on another male Koffenberger who landed in Maryland (1840s) but is not on any MD census. Thus he probably moved elsewhere. I'm doing this from memory since my son has become the keeper of the records so if you feel that we could be of assistance let us know.