My verifiable Kraft genealogy only goes back to my grandfather, Max Emil Kraft, who lived in Waterbury CT in the mid 20th century. Somewhere I picked up the detail that he had an ancestor named Sebastian Kraft, but I found nothing further. The family seems to have come from the Trossingen/Bickelsberg area of Germany, with marriage ties to Hummel and Binder. For more details, see http://ccat.sas.upenn.edu/rak//gen/geneal.htm.