Possible daughter, Rebecca??????

Mary Keys was born in the 1720's or 1730's, perhaps in North Carolina, though it is very probable she was born in Ireland. She married John Boggs and had the following children in N.C.: James L. (b. 1752), John Jr. (b. 1756), Phoebe, and others. James L. went to Lee County, Virginia, and eventually ended up in Kentucky.
Information regarding Mary's parents or siblings would be appreciated!(Rosa Marr)