Daoud Roubani is the name of a folk hero of the Pushtun tribes, and the similarity of the names is certainly striking. There does appear to be some sort of historic connection between the country of Afghanistan, and the wanderings of the Jewish people. He was no doubt sincere in pursuing his mission, which was to make an alliance with the Europeans against the Muslim conquerors in the East. He seems to have been too trusting of other people, especially Kings, and died as a martyr of the Inquisition.