User blog comment:KeisariApaSetä/Crazy Theory I Thought Up Few Years Ago/@comment-27930128-20170121010507/@comment-24850639-20170123212104

I know what you mean. There's still a LOT of unanswered questions regarding Straw Hat origins. Names are only the tip of the iceburg.

Luffy - We know who his dad is, but who's his mom? If she's still alive, where the hell is she and why? Why did Dragon leave Luffy in Garp's care? Why does Dragon act so weird anytime someone brings Luffy up? Do Dragon and Garp have a positive relationship?

Roronoa Zoro - We know what's presumed to be the family name, but don't know EITHER of Zoro's parents. Why the hell was a kid his age just wandering from place to place with no one asking any questions? What Zoro's story from after he left the village to when he met Luffy? He stated having heard of the Happou Navy before, yet we know for sure that we haven't heard of them on any of the straw hat adventures up until now. Oda's hinting a deeper history on Zoro, especially with the uncanny resemblance to Ryuuma - who he already knew cut down a dragon somehow (I don't think anyone on Thriller Bark mentioned Ryuuma doing that, but I could be wrong)

Nico Robin - Who was Robin's dad? How did he die? Was it related to Olvia's mission in any kind of way? We know she ate it at some point during her childhood, how did Robin discover the Hana Hana No Mi? What exactly was this "organization" that Robin joined when she was 16 years old? 20 years of doing nothing but running seems kinda vague, I'm almost certain that there's more to her adventures prior to joining Baroque Works.

Franky - Is Cutty Flam even a real name? Who were these pirate parents of his that just tossed a child in the ocean and left him to die? Is Franky truly ok with never seeing them again to address this?

Brook - Probably the most obvious of all, Oda hasn't exactly been secretive about letting us know that Brook has seen quite a lot in the 90 years he's been alive. In addition to just the name, we've got a "certain" kingdom to eventually learn about, as well as all the other tidbits of history that Brook supposedly witnessed in some kind of way - Dragon's "presence", Vinsmoke history, the pirating age when Roger was still a rookie, etc.

Usopp doesn't really have much we don't know, aside from maybe a full name. Same with Nami, except the things you pointed out such as her real parents and what happened to them. We've gotten the majority of Sanji's, in addition to whatever else Oda will thrown in as he details more Vinsmoke history. Perhaps Oda doesn't answer all of this, but I'm confident he will address most of it.