DeGroft Family Genealogy Forum
LDS Film #0022133, pp537-540
Located the will of Michael Degroff, b Jan 09, 1726, Kingston, Ulster Co. NY; died Aug-Dec, 1793, Mount Pleasant Township, York Co., PA. Will dated Aug 20,1793. 14 of his 17 children named as well as wife (#2) Margaret.
It would appear that this Michael married first, Rachel Swart; six of their seven children named in the above will. Later Michael married Margaret Kray; eight of their ten children named in this same will.
Margaret Kray Degroff's will can be found in LDS Film #0020677, pp 419, 420.