oh god... have you ever learned biology? if you have a child, that baby inherit yor genome/genes or how you call it in english. it's happenes even if your partner is not from your clan. that's possible that child won't be look like your and/or your partner... back on topic: knowing that every hyuuga posses the byakugan:
1. all of the marriages happening in the clan
2. their genes are superior
Lmao of course I didn't mean children of someone of Hyuuga blood.
I was referring to this.
yeah u can marry someone in your clan.. because most of them aren't blood related.. in the same way you would be in a real life clan or tribe
But then I also got to thinking... it seems like everyone in the clan has Byakugan. Or at least the white eyes. How is this possible unless everyone is blood related?
Hm, I think most of the marriages are between distant cousins.
Back on topic! Does the OP mean inter clan marriage between clans with kekkai genkai / bloodline limit? cause I mean, namikaze and uzumaki got married... >.>
or do you mean like, a hyuuga marrying an uchiha? lol sharinbyakugan.