Notes for David Guenzburger: Settled in Breisach around 1643; residence recorded in 1650 document, copy from David Blum, also recorded in Moses Ginsburger's, Die Guenzburger im Elsass; May have come to Breisach from Ensisheim; In 1664 in Ensisheim, back in Breisach in 1676 or 1677;