Judas Iscariot
Judas Iscariot (died AD) was a disciple and one of the original Twelve Disciples of Jesus Christ. According to all four canonical gospels, Judas betrayed Jesus to the Sanhedrin in the Garden of Gethsemane by kissing him and addressing him as "Rabbi" to reveal his identity to the crowd who had come to arrest him. His name is often used synonymously with betrayal or treason. Judas's epithet "Iscariot" most likely means he came from the village of Kerioth, but this explanation is not universally accepted and many other possibilities have been suggested.
Yeshu
According to Dr. Rubenstein, the account in "Sanhedrin" 107b recognizes the kinship between Christians and Jews, since Jesus is presented as a disciple of a prominent Rabbi. But it also reflects and speaks to an anxiety fundamental to Rabbinic Judaism. Prior to the destruction of the Temple in 70, Jews were divided into different sects, each promoting different interpretations of the law. Rabbinic Judaism domesticated and internalized conflicts over the law, while vigorously condemning any sectarianism. In other words, rabbis are encouraged to disagree and argue with one another, but these activities must be carefully contained, or else they could lead to a schism. Although this story may not present a historically accurate account of Jesus' life, it does use a fiction about Jesus to communicate an important truth about the Rabbis. Moreover, Rubenstein sees this story as a rebuke to overly harsh Rabbis. Boyarin suggests that the Rabbis were well aware of Christian views of the Pharisees and that this story acknowledges the Christian belief that Jesus was forgiving and the Pharisees were not (see Mark 2:1-2), while emphasizing forgiveness as a necessary Rabbinic value.