By now, I am sure you have found the information you are looking for but just in case you hven't - I hope this helps!
Negelina E Stewart was my great grandmother. She is buried at Banner Chapel Cemetery in Benson beside her husband, James R. McLamb and son, Jesse B. McLamb (my grandfather) and his other family members including my mother.
We just had another family reunion on March 24th and it was held at the American Legion Building in Benson.
Negelina and James Robert "Bob" had fifteen children: Frank, Fernie, Carson, Herbert, Mack, Joe, John, Jesse and Bill (9 boys) and (six girls): Ellie, Nellie, Lula, Doll, Elsie and Mary Eleanor (not in that order.
Sorry, I do not have any info on her family members such as sisters etc but do know family that might. If you decide to, please contatc me at firstname.lastname@example.org