Is it possible that you have the wives of Silas Wade Yopp mixed up? As our family has it told Walter Wade Yopp had one brother and one sister which were full-blooded. the second wife of Silas Wade provided many more children, and therefore half brothers and sisters, but bad blood existed among step-mom and previous children.... I know there were two wives, indeed, could however the order of the marriages been mixed up? I am however, only guessing here. That is the "lore" of the Yopp family as I have been told.