I have the book, "Genealogy of a Branch of the Johnson Family and Connections" compiled by Penelope Johnson Allen.In it is a copy of the manuscript of Col. Ephraim Malone Johnson, a grandson of John and Susannah Stell.In it he tells the relationships of the Stell family.Dennis, son of John and Susannah, married Sarah King in So. Carolina. In about 1822 he moved to Gwinnett Co., Ga. & settled on Beaver Creek.Dennis died in about 1837.His widow and some of their children moved to Arkansas.Their family were Robert, William, Leah, John, Rachel, Sarah and Dennis, Jr.This Robert married Winnie Gentry, daughter of John and Betsy Gentry, their neighbors.This Robert lived on Mt. Creek.He moved to Arkansas in about 1835.His brother William married Patsy Gentry sister of Winnie.Leah married Larkin Brown. John W. married Nancy Clower. Rachel married Samuel Verner in S. C. and moved to Guinnett Co. and later to Cobb Co., Ga., Sally married Hiram Willbanks in S. C. and moved to Gwinnett Co., and later to Arkansas. Dennis, Jr. married Eleanor McPherson of S.C. He lived in Gwinnett Co., later Arkansas where he served in the Legislature. Later he moved to Texas.
I'm sure your Robert is not the son of John and Susannah, but a grandson.I am a descendant of Robert Malone Stell, Sr., son of John and Susannah Stell.
I hope this helps.Please check it out through records.I'm sure you'll find it correct.