Board Thread:Episode Discussions/@comment-1181222-20180131111324/@comment-732150-20180131201903

Kekkei genkai showing up in different places can also be attributed to kidnapping. We know Kumogakure tried kidnapping Hinata for the Byakugan, and Kushina for her jinchuriki potential. At least some such attempts in the past were probably successful. It could also be due to scattering of clans. Haku's clan was chased down, so it's possible scattered survivors settled in different places, kinda like the Uzumaki did.