User blog comment:Aba1/Rayleigh is Luffy's uncle?/@comment-4117216-20110911192050

I highly, highly doubt that they are related. People say that it can't be cause otherwise it would be monkey d rayleigh. But.. What if dragon had a sister who got married??? Then it would be possible right? So a blood relation is out of the question I think. But there is a chance he is still part of the family in that way.