Jesus of Nazareth was a religious icon and leader, similar to Lister. It was in his name that Christianity was formed.
Judas was born into a large family. He had a twin brother named Jesus of Nazareth
Christianity formed in his brothers teachings and name. A special branch later formed of a group correctly theorising that Jesus and Judas were siblings and that they had, at one point, switched places. Arnold Rimmer's mother was in this branch, and thus named her son Arnold Judas Rimmer, hoping that he could sacrifice his popularity for others, like she knew Judas to. ("Lemons")