Is Aang Zuko's grandfather?

no he is spiritually related to him but thats all. Aang is only spiritually related to roku because he is a rcarnation of him. Aang and roku do not share blood or appearence similarities so they are not family.

Yes he is. It's true Avatar Roku was Zuko grandfather, and Aang is the new reincarnation of Roku. But even Aang didn't know about it,but somehow he do feel like he have a connection with Zuko. So it is preety abvious and technically that Aang is Zuko grandfather. Well that was what I think, but I don't know about the other fan thought about it.

YUP! ^^

great grand father cuz avatar roku is zuko's mom's grand father........wierd hun

yes,kinda as he is spirituality so zuko would feel a bond with aang, however biologically connected then no

Avatar Roku was Zuko grandfather on Ura's side, Aang's the new Avatar after Roku. But somehow Aang did feel like he has a connection with Zuko. So no, it's a spiritual relation and not in blood.

no his granfather is sozen friends with avater roku

yeah i guess so that would also make aang best freinds with the person who wiped out his people-sozi. weird. no wonder aang felt so hesitant about killing oazi. he would be killing his grandson.