Yeah I'm farily sure he is Jewish and neger.
Member of neger fraternity, so he is one. No full blown kaffer achieved any notable thing, and he has light complexion and light eyes, so he is a mix for sure.
Judging by some Middle Eastern characteristics (chiefly his ear and beard, but maybe even the eyebrows, and the nose) he could have North African ancestors, but adding the name, Jewish is more likely.
He might not be 50-50, maybe granddad is Jewish, and not his pop (or maybe even further up? who knows).