Margaret Jones - Margaret Jones is not the half sister of my Grandfather William Edward Jones

Hi my name is Verla Jones Burdette.
As far as I know In 1886, my Great Grandfather Samuel Jones was in Franklin County, Missouri, USA. I have hit a brick wall with him. I don't know the names of his parents, since he died about 1888. My research, has my Grandfather William Edward Jones, is his last child.