Categories: Lists of ambiguous human names | Disambiguation Frederick III (or II) (1272 – 1337), King of Sicily, was the third son of King Peter III of Aragon and Sicily, and of Constance, daughter of Manfred. ... Frederick II (December 26, 1194 – December 13, 1250), Holy Roman Emperor of the Hohenstaufen dynasty, was pretender to the title of King of the Romans from 1212, unopposed holder of that monarchy from 1215, and Holy Roman Emperor from 1220 until his death in 1250. ... Ordinal numbers or regnal numbers are used to distinguish between persons with the same name who held the same office. ... It is nearly universal for a person to have a name; the rare exceptions occur in the cases of mentally disturbed parents, or feral children growing up in isolation. ...