Children of Sampson Newton LACKEY, Texas

My great grandfather is Sampson Newton Lackey, this is a list of the known children:
with 1st wife Minnie Cox--Marvin; Gincy (had 18 children with George Autry); Essie (married Curtis Fenn); and Annie Maggie Lee (my Grandmother who married Charlie Luther Bratcher).Sampson married after 1st wife was killed in a fire abt 1905.His second wife was Cora Barnett, their known children are: George; Dovie; N.J. (who married a woman named Pauline); and Earl (who died in 1940's he was a steelworker).Any information on any of these people would be appreciated.Also, Samp had brothers named Mart and Nathaniel, I am sure that there were others. thanks