I referring to the Robert Issac Grier listed here.
First questions is this the same Robert Grier in the DAR records for:
GRIER, ROBERT Ancestor #: A048080
Service: GEORGIA Rank: LIEUTENANT
Birth: 2-20-1755 YORK CO PENNSYLVANIA
Death: 8-6-1822 DALLAS CO ALABAMA
Service Description: 1) MILITIA
Also I have a listing for a Robert Issac Grier b. 20 Feb, 1730 in Ireland. d 1801 White Plains, GA. Married to Catherine Elizabeth McMurray (Burns?) b 1735 - Who were parents of Robert Junior Grier - who I think is the same as this listing for Robert Issac Grier. I also show the older Robert Issac Grier having other children, Elizabeth b 30 Dec 1757, Moses Floyd Grier Senior, b 3 Jan 1759, Mary b. abt 1762, Thomas b. abt 1763, Jean b. abt 1765, and Aaron W Grier Senior b abt. 1767.
Unfortunately it appears that there were many sons of Grier families given the name Robert, and while some were identified as junior/senior even that got confused in what I've seen, and I've been unable to come up much in the way of original documentations to verify much of this.