יצחק קדורי Rav Isaac Kaduri one of the most well respected mystics in Israel left a not that was not to be opened until after he died. It was opened and said the name of the true messiah is Yeshua [the well known name of Jesus in Hebrew]. It was ignored as you can imagine. Still, it does lend a degree of credibility to Rav Avraham Abulafia [a "mekubal" mystic from the Middle Ages] who wrote that Jesus is the messiah son of Joseph that is mentioned in the end of the Talmud tractate of Suka [Also this subject is brought up in Kol HaTor of the Gra and the New Tikunim  of the Ramchal.]