Board Thread:Naruto Discussions/@comment-28136690-20160509145112/@comment-26093449-20160509190839

Hinata is a distant relative of Hamura, most likely not a reincarnation of him or anything. I personally assume he called her that just because she was the first person with the Byakugan from the earth he met or because she was with Naruto, a reincarnation of his niece. Or perhaps both.