may utc prince felix of schwarzenburg is at the right location his uncle and then his cousin was the f rst while felix's position all of his life was that of a prinz this distinction is tougher for families where all used f rst like wrede and also titles like herzog and graf but it is easily determined i am as certain as you are about alfred iii because you moved him to the numeral and the only royalty who used numerals other than the heinrichs reuss were the heads of houses and families friedrich johannes jacob celestin von schwarzenberg has the wrong nobiliary particle anyway he was zu not von he was also a junior prince because he had an older brother who outlived him who was also the prince john adolph ii i don't mind leaving the german von or zu for princes of territories if the title isn't used for instance felix zu schwarzenburg and prince felix of schwarzenburg would both be acceptable but not a mixture adolph von auersperg had an older brother who died after him but a source i have gives adolph's title as f rst which wouldn't make sense i would leave him be for now and ask on his page if he was head of the house prince karl of auersperg is actually the brother in question so logic would mean that he was the f rst but again i would ask on the page charles