Board Thread:Consensus Track/@comment-34115-20150626063702/@comment-1207741-20150626071212

As I explained and provided evidence of in the discussion Omojuze linked to, clan/family/tribe is not capitalized in most cases by most sources. Typical exceptions include royal families, which fulfill proper noun's abstract "specialness" clause, and groups in which clan/whatever is part of a group's actual name, ie. "Navajo Tribe of Last Wednesday's Jubilee."

Minamoto attempted to argue (or at least it's what I got from him) that any normal noun, when put with an indisputably proper noun - in this case the normal "clan" with the proper "Uzumaki" - becomes a proper noun. But that argument, again as I understand it, quickly falls apart, otherwise you'd end up with the following supposedly proper nouns: And I think we would all agree that these aren't proper nouns.
 * Uzumaki Hair (it's red!)
 * Uzumaki Chakra (it's strong!)
 * Uzumaki Fuinjutsu (it's spirally!)
 * Uzuamki Clan (it's extinct!)

The real question in determining capitalization is whether or not "clan" is part of a formal name or if it's merely an indication of what they objectively are. My own reading is that they are not called the Uzumaki Clan, they are the Uzumaki clan. I asked Seelentau if the Japanese indicates otherwise, but he didn't respond.

Historically, the wiki has not capitalized clan in normal usage. Intros of clan pages (and not the rest of the articles) were switched to capitalization within the last week and that has gradually started spreading out to other articles. There have been exceptions to not capitalizing: I think infoboxes have required capitalization in order for smw to work correctly, or at least they did once upon a time and nobody's noticed if it's been fixed or not; And, as is sometimes an issue with using title case, users sometimes think that links to articles should be the same as the articles being linked to, so they use X Clan when the rest of the wiki uses X clan.