What happens when a member of the main house of the Hyuuga clan marries a member of the branch house of the Hyuuga clan? I've been thinking about it for a while now, but what if a member of the main house of the Hyuuga clan marries a member of the branch house of the Hyuuga clan ?

I've searched everywhere for the answer, but I couldn't seem to find it anywhere.
At the end of the day, both are still "Hyuuga".

We remember from all the way back to Hinata vs Neji that his father cries and says "I wish I bore you into the main family". Then, even if his father was a branch member, had his wife been a main member, Neji would be a main member as well.

Other than that, their problems were settled after Naruto puts Neji's mind back in his head after they fought in the Chuunin exam. In the flashback as well, Neji's father asks Hinata's father to tell Neji the full story when he gets older but at first, he refuses.

Hinata's father apologizes to Neji after his fight against Naruto and it is implied that there is some harmony between the 2 families. After that it seems that the tension between the families calms down.