I believe that my husband's grandfather was your grandfather's brother.According to the 1910 census Allen Grant Sisemore and Hannah Elizabeth (Bray) Sisemore had the following children: Burton 16 John R. 14 Mammie E. 10 Bennie Lee 6 *my husband's grandfather* Earl F. 3 *your grandfather* Gracie L. 1
Allen Grant Sisemore listed carpenter as his occupation. Lizzie's parents were John and Matilda Bray. John's parents were Shadrack & Hanah (White) Bray.
Hope this helps.Let me know if you have any other information.