Originally Posted by
splash
His Grandpa.. I have always been under the impression that Gold Roger is Luffy's Grandfather. Either that or Luffy is definitely a direct descendant of the Pirate King. It just seems so, after so many hints that have been made in one piece. Like how Gold Roger is actually supposed to be named Gol D. Roger. Also, Robin mentioned something in the Arabasta arc about people with 'D' in their names as being very unique. When Ao kiji mentioned luffy's grandfather, it all seemed to fit perfectly with the assumption. Even if Gold Roger is not Luffy's grandpa, i am pretty sure that Luffy and Ace are related to the pirate king.