Who are the super-est supermen of pre-Golden Age SF? Dzyd Joshua has the rundown over at io9, complete with great cover art as usual. Best hero name/book title might go to Hugo Gernsback's 124C 41+: A Romance of the Year 2660.
That name reminded me of this Keeler concoction—probably the only character in literature with not just numbers but fractions, multiplication, and shapes in his name:
(from Richard Polt's essay "Race in Keeler")
(Hmmm, time to read Ch. 20 of Crippled Detectives!)