Also, check on some of the relationships where spouse Catherine was born in Europe and stayed while he was apparently always in America. Same for his mom Ann while his father was here. Some things don't work out with places, please. If they were this way, need an explanation such as "father was a sailor", I don't know, but please check. Thanks.
John Harrell, ll, of Nansemond County Was not married to his sister (who was not Grace) or to Sarah R. Harrell. Disconnected Sarah.
Crystal Gayle supposedly descends from Galloway & Harrell
https://gw.geneanet.org/tdowling?lang=en&pz=timothy+michael&...
lawrence aka larry burt, Grace Boswell Harrell does not have any parents noted on her profile. There is nothing about her "marrying her brother."
Please read the profile for Grace Boswell Harrell for it contains the text of the will of husband John.
"I Leave to my Beloved Wife, Grace Harrill, Dureing her Natural life or Widowhood, the Use of the Plantation -whereon I now live, & all the Land thereunto Belonging, and all my Stock of Horses, Cattle, hoggs & Sheep, & all my Houshold furniture & Plantation utensils; and the use of the following Negroes, (to wit) Patt, Bett, Rachel, Sambo, Jemmy, Jenny, Phillis, & Jack, and after her Decease or Marriage, to be Given & Divided in the following Legacies."
Her profile also notes that her parents are unknown. I don't know where you have the idea that "Grace's mother Ann Smith then married John Harrell." Ann Smith was the mother of John Harrell. Look at the tree. Ann was married to John Tyler Harrell of Nansemond, father to John Harrell who married Grace. Please look at the tree.