I was looking up the man on the moon, and this is all that I found when I Googled it. Apparently it is just a household tale that Dante alludes to. Cain apparently was forced to circle the world as the moon and see what he could not have due to his betrayal.
One medieval Christian tradition claims him as Cain, the Wanderer, forever doomed to circle the Earth. Dante's Inferno alludes to this:
- "For now doth Cain with fork of thorns confine
- On either hemisphere, touching the wave
- Beneath the towers of Seville. Yesternight
- The moon was round."