You can also find information on the family in a book which is out of print but is available though some companies which specialize in out of print materials.Also, so of the larger libraries and the Library of congress have copies.
"Genealogy of the Desendants of John Gar, or more particularly of his son Andreas Gaar,"
The book is written by John Wesley Garr, M.D. and Completed in 1894 by his son, John Calhoun Garr.
It was reprinted by Higginson Book Co. 148 Washington St., P.O. Box 778 Salem, Mass 01970
They also have a web site www.higginsonbooks.com
The book is approx $100.00 or more.I do have a copy which my husband gave me one christmas.