Is Madara Obito's Ancestor?

[Torche]

Yeah that's because the clan actually descended from them.

Same as Tsunade's ancestor would be Hashirama's Father, but the rest of the Senju aren't.

I edited the post, please read the rest.

 

[Yuse]

he is to all of them being a clan they are all related

 

[Barbarossa]

This theroy was never suggested or mentioned in the manga ever