 :I thought you were going to make an argument based on what religion he was brought up in, but looking at the article I see that the only one of his grandparents who wasn't born Jewish is his maternal grandmother. So by that traditional definition, he isn't Jewish. Didn't save the family from the activities of a fellow pupil at his school. Now was Hitler slow? Or was Wittgenstein two years ahead of most of his year group?  