Sebron Monroe (Sebe) Nichols is the older man, second row, on the right holding a fiddle with the bow in front of his face. His wife is the woman on the right holding the little girls. 

The other older man on the second row on the left is Joseph Franklin "Joe" Nichols and the woman to the right of him is their sister, Ollie (Mariah Olive) Nichols-Kelly.