Katherine, I was just wondering if this George lived in Clark County, Ill or thereabouts? I have census records of a George W. Zellars that lived in Clark County, ILL. I never looked at his brothers or sisters, but they are Ella, Emma, and Ida in the 1870 Census mother Letitia. There is also a Demoss Zellars that has a son George in the 1860 census. His mother in that census is Jane and sister Virginia. Don't know if this helps but it is what I have right now.