Board Thread:Consensus Track/@comment-34115-20150626063702/@comment-1018594-20150626071453

Omojuze wrote:  Discussions have happened about this before (Sorry, @Minamoto15, for linking your Talk Page). Though, Yeah, it should be once and for all decided by the community.

In case of tl;dr - "_____ Clan" is typically referred to as a proper noun. "Clan" alone isnt. Therefore, when attached to a family name within an article, "Clan" should be capitalized. Makes sense.