i heard may be associated with the historic yocum dollar? http://thelibrary.org/lochist/periodicals/wrv/v8/n11/sp85d.htm http://www.stateoftheozarks.net/Cultural/Storytelling/YocumDollars....
Variant spellings include: Yoakum, Yokum, Yocum, Yocom, Jochem, Yocumb, Yochum, Yochumb, Yokem, etc. (1)