Boris Gudenuf
Deity
There's a lot of evidence that "king" was a dirty word for most Indo-Europeans. The Greeks considered monarchy the very mark of the barbarian (including those filthy Macedonians), the Latins hated the rex, and there's good reason to believe that Celtic rix and Germanic kuningaz/rekaz are better translated as "chief" than "king." Even the Hittites and Persians (and, later, Alexander) picked up the notion of the god-king from contact with their Near Eastern neighbors (and Augustus probably from Egypt).
Given that the 'Indo-Europeans" were pastoral groups, and given the evidence from every historical pastoral group (Native American, Scythian, Hun, even Mongol ) "King" seems to me to have been a title that was applied to them and their leaders from the Outside. In reality, their Leaders were subject to consensus, and even when they wound up with something resembling Monarchial Authority, i didn't stick. Two of the best known examples of Barbarian Kings, Attila and Chingis, both spent most of their careers clawing their way into control of their societies, and as soon as they died, Attila's empire fell apart and all the Mongol leaders had to run back home because Chingis's successor had to be confirmed: there was no automatic succession or 'God-Given" right to rule for anybody in those societies.