I am afraid I can't help you out, but could you please give us some information about any Eisbergs that moved from Germany to the Netherlands in the early 17th century. Some time ago my father and brother tried to find more genealogical information, but that was way before the Internet days. There are only few Eisbergs left in the Netherlands. My dad died in 1992. My brother has no offspring, and my children daughters have my husband's surname. I only know about one distant cousin living in the Netherlands.