I was just reading about Tonrak and Tribal chief and whatnot, and I thought of something weird: Since Tribal Chiefdom is passed down to the eldest son of the then-Chief in the Southern Water Tribe, who would Tonrak and Unalaq's father be?
So I did a little bit of research, and as I'm typing this, I'm still doing fact-checking. Everything works so far, and everything matches up perfectly. This is my theory:
SWT chiefdom is like Fire Lordity or Earth Kingism; it passes down to your eldest child, unless something happens that makes it so that it goes to the second-eldest.
Tonraq and Unalaq's parents have never been revealed. The most we've got is a mention of Unalaq's father in some mobile trivia game, which doesn't say his name.
Sokka died between 158 and 170 AG. How he died is unknown, but it's been shown that one doesn't have to die in order for their eldest to become the next big guy, as Zuko abdicated his throne to his daughter Izumi.
Unalaq's reign as Chief of the SWT started before 158 AG, the earliest date in which Sokka, the previous chief, could have died. It was never stated or implied that the STW royal family changed families, and there was no reason to.
Plus, they all have brown hair, tanned skin, and light blue eyes.
Now, this brings up another topic. Since Sokka was Aang's brother-in-law, does that mean Korra has Aang not only as her past life, but also as her grandfather-in-law? How would that be possible? Although, Korra wouldn't be Aang's direct descendant, just an in-law, and they're still from seperate nations.Â
Let me know if there are any holes or more evidence in this theory, and let me know what you think. All my sources are from Avatar Wiki, nothing is made up, so don't worry about any false sources. I don't care if you fact-check my theory evidence if you're a skeptic. Trust me, I did that a lot.
But hey, that's just a theory. An AVATAR THEORY! Thanks for reading!