These may have been the half-brothers and half-sister of my g-grandmother Miriah Ann LINDSEY born 1850, South Carolina.
Not much to go on, but it's all I have.
I'm supposing Miriah (Mariah, Maria, Mary) LINDSEY's father died, and her mother - name unknown to me - then married BLOCKER. They lived in and around Colleton County, South Carolina.
Miriah Lindsey married Marion Doyle, South Carolina. Their daughter, Bertha Mae Doyle, married Theodore Hull Poythress, who are my grandparents.
Does this sound familiar to anyone?