Re: Is Gold D. Roger related to Luffy?
I once thought that Roger was Luffy's father That was before I knew that A. Roger died 22 years ago and Luffy is 17 at the current point in the story and B. Luffy's grandfather was Garp and his father was Dragon.
But as of now, I think that there is no relationship. People suspect that all of the "D."'s are related, that they were the ruling family of the ancient kingdom, but due to the fact that there are "D"'s of other species, and the fact that monarchy has an authoritarian connotation that tends to get cast as bad in One Piece (though I live in America, and Americans have been known to have issues with monarchs) I currently believe that the "D."'s were all members of a ruling COUNCIL of the ancient kingdom. Therefore, there would be no familial relationship between all "D."'s, so Roger and Luffy would be descended from different council members, hence the different surnames.
I mean, it's impossible that he was Luffy's father or grandfather. He was dead too long ago to be even Ace's father, and it's been confirmed that he isn't. Besides, with Luffy's forbears covered back that many generations, odds are that he isn't a cousin of some sort. Garp would probably know if he was, and the World Government would probably be MUCH less tolerant of Garp if he were at all related to the Pirate King. People like to stamp out the families of their enemies completely. And also, I think it would be more meaningful if Roger and Luffy were related by ideology rather than by blood, but that's a personal preference, not based so much on the facts of the series, except for the fact that people comment on Luffy's personality being like Roger's not his looks, which could be reading too much into that, and Luffy's parentage being accounted for already. To my mind, the only way that Luffy and Roger could be related is if the "D."'s are all related, and as I said above, I don't believe that that's true.