Bryan O'Bannon's will - in abstract- says: My son John and his wife Sarah, and John's dau Sarah; my son William; son Samuel; dau Elizabeth Ambrose; dau Ann Miller (Mary Ann m. Simon Miller); grandson Thomas, son of son John; grandson William, son of son William; grandson Bryan, son of son John; grandson Bryan, son of my son William; ...to each of my 27 grandchildren, male and female, ten pounds current... (I have not found all 27 grandchildren!! I have about 23!)
...to my natural children, Aron Johnston and Francis Johnston, children of Margaret Johnston...257 acres of land in Fredrick County...should they die before they become of age, the part of one goes to the other, and if both should die, the land goes to Bryan O'Bannon, grandson, son of son John O'Bannon. ...my son-in-law Jacob Hite and my granddaughter Elizabeth Hite to have the care and management of said children - Aron and Francis...500 pounds tobacco to be yearly paid to Margaret Johnston for the support and maintenance of the said Francis for the space of four years. Exors were sons John and William and son-in-law Jacob Hite. Witnesses were Elias Edmonds (son-in-law), Samuel Earle (friend), and James Rogers (friend) Proved 25 February 1762 by oath of the three witnesses.
Aron Johnston and Francis(female)Johnston were the natural children of Bryan- which meant that he did not married Margaret, the mother. Both died before they became of age and the land went to Bryan, the son of son John.