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(Appalachian) Plural form of that. Mglovesfun (talk) 23:18, 2 October 2010 (UTC)
It's not very hard to produce three uses of themsas (“those who”) —  — but I'm not sure whether thems is used otherwise in this sense. Probably yes, but it's hard to search for. —RuakhTALK 00:30, 3 October 2010 (UTC)
It's essentially plural of that, or otherwise an Appalachian form of those: "Thems are good cars."
Recorded examples are a bit hard to find, but otherwise, see the Talk on its page. Wōdenhelm 04:42, 22 October 2010 (UTC)
+ Also, here's a Twitter users's status, using thems as a form of those/these, seen here. (I have no clue who the user is. I searched Google for thems are, and this was in the top results) Wōdenhelm 23:13, 29 January 2011 (UTC)