You should check Marty Grant's website for information on the several George families in this area--if you type in www.martygrant.com it should come up.
I have seven children listed for James George, Jr. and Mary Swift:David, Elizabeth b. 3/10/1768; Mary Watts b. 5/15/1770; Nancy b. 2/4/1773; James III b. 2/20/1775; Frances b. 3/2/1777; Robert b. 8/16/1783.
I don't have children listed for all of these, but I do have marriages for some:Mary married Benjamin Colvard, Nancy married Francis Underwood; Frances married James Underwood; Robert married Judith Hardin.