My great great grandfather was John Hoover Sheffield and his wife Martha Harvey was my grt grt grandmother. Their son John Harvey Sheffield was my grt grandfather. William Sheffield of Bulloch Co GA married to Mary Abbott was my grt grt grt grandfather. I have lots of research I am willing to share. My brother did the Sheffield DNA project and we have some great matches to these men. You mentioned four brothers. I am interested in that story.You may email me at firstname.lastname@example.org.