You might want to check this book out for more info.
NOTES HABERSHAM BOOK Google books
James Mackay, of Strathy Hall, Esq., member of King's Council, etc., speaks of
his grand-son, John Kellsall; granddaughter, Ann Kellsall;
grand-children, Barbara, Ann, Simmons,
John and Stephen Maxwell, children of deceased daughter, Ann Mackay, by her late husband, James Maxwell.
To Mary Maxwell, wife of John Butler Maxwell, daughter of deceased daughter, Ann.
Mary Simmons, wife of James Maxwell, of St. Phillips Parish, Ga., bequeathes to sons: James, William and John Maxwell; daughters: Jane Gray, wife of Joseph Gray; Elizabeth, wife of Thomas Young; Esther, Mary and Constant Maxwell. Grand-sons: Morgan Sabb, William Maxwell, Adam Joseph Gray, Dunbar Gray, Elisha Maxwell, James Mackay Maxwell, James Benjamin Maxwell and John Butler Maxwell, certain property.
I. Mary White Footman, daughter of Richard S. Footman and Mary C. Maxwell; daughter of James B. and Mary (Habersham) Maxwell, married Col. John Screven of ancient family, and had:
I Proctor Screven.
II Georgia Screven.
III. Elizabeth Screven, married Thomas Arnold, and had Louise and Mary Arnold.
IV. Thomas Screven, married Emily Lawton. Superintendent of Police, Ordinary of Chatham County, Major also of S. V. Guards.