Jacob
   Family history of Jeffrey Alan Jacob including surnames Kuyper, DeWit and Cox.
   http://familytreemaker.genealogy.com/users/j/a/c/Jeffrey-A-Jacob/

Jacob Family
   Ancestry of Marc Jacob, Summerville, SC USA.
   http://familytreemaker.genealogy.com/users/j/a/c/Marc-Jacob-SC/

Jacob and Gross Family Trees
   Ancestry of Robert William Jacob of Fairport, NY USA.
   http://familytreemaker.genealogy.com/users/j/a/c/Robert-W-Jacob/