Couldn't find any valid last name at birth.
Thank you to Steve VanderLeest for creating WikiTree profile UNKNOWN-201719 through the import of ClasinaVanGeestAncestors.ged on Jun 6, 2013. Click to the Changes page for the details of edits by Steve and others.
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[Do you know Anna's family name?] > Anna Cornelisdr (UNKNOWN) Unknown