I have a biographical sketch for Elizabeth Parker 1766-aft 1825 who married Michael Collier, grandson of Thomas Collier. His presumed sister Sara Collier, married John Parker, a sibling of Elizabeth Parker. This was recorded by Ohio Supreme Court Justice Thomas Scott in his 1851 letter to his children on the occasion of his 79th birthday outlining their ancestry. You can find my sketch for Elizabeth Parker here:
http://sites.rootsweb.com/~theduffypapers/parker/1779-80_elizaberth...
Be forewarned that the Geni profile for Nathaniel Parker 1724-1811 of Parker yDNA Family Group #18, is corrupted with children from a different Nathaniel Parker who married Ann Clayton of Parker yDNA Family Group #05. It was Nathaniel Parker 1724-1811 of Parker yDNA Family Group #18 who per the 1851 Thomas Scott letter migrated from Patterson Creek, Hampshire Co., VA to Sumner Co., TN. abt. 1790.