Interesting link (a complete book!):
The Beloved Disciple: His Name and His Story
by Vernard Eller
"I am not claiming here to have proved that Lazarus of Bethany was the
Beloved Disciple. But I will say again that, if it is not Lazarus, then we
have not been given a ghost of an idea about who it might have been. Lazarus
fits better than any other possible candidate. "
Wieland Willker, Bremen, Germany