I'm abbreviating it as KM, fuck your nomenclature. "Of, and", makes no sense to put them in acronyms, unless it's to distinguish it from another acronym. Is KM an abbreviation that evokes something to anyone else? Off the top of my head seems ok. KingsMen for short.
Oh btw, your title is totally sexist. Has to be some bundle of sticks out there that will complain about the masculine title. King/Men, where are the Queens/Women? Haven't you heard, it's 2016?!
Of KingsMonarchs and Peasants?