In various deeds Robert's last name was spelled McIlwain, Mucklewain, McElvain, and McIlvain!
This man may be a brother to (John) rather than a son. His wife and youngest sons, George and Andrew, were mentioned in his father-in-law's will in 1772.
Residences & events:
7/1/1762 Strasburg Twp, Lancaster Co, PA. Robert received a grant from the PA Land Co for a large tract of land.
8/18/1762 He and wife, Mary, promptly sold 335 acres of that land to a James Kenney for 113 pounds, 1/3d and another 125 acres to Thomas Erwin for 314 pounds. Mary signed her name with an X on both deeds.
His will was not proved until 7/2/1772. It named his wife, Mary, and children: Elizabeth, Margaret, Robert, William, Mary, George, and Andrew, as well as brother-in-law, Rev George Duffield.