Most if not all of the Morrows of the clan that came to Collin County, Texas and the ones that lived in Farmersville area are descendents of Thomas Morrow II b. 1770 SC d. bef 1840 Maury County, TN and Elizabeth Keith Morrow, b. 1781 d. bef 1846, possibly Maury County, TN.
Thomas Morrow II was a son of Thomas Morrow I and Elizabeth. Which were part of the 5 Morrow Men.
There are a few Collin County, Morrow's still alive. I am not sure other than Cindy Bray who has done extensive reserch on the line that you could possibly talk with. Most are not doing research or very elderly.
The Morrow/Willcoxson family lines came to Collin County, Texas from Maury County, TN. The Farmersville lines are descendants of these two lines.
My husband is a Willcoxson and I do the research.