What was Mark Twain's actual name?
Samuel Langhorne Clemens was known the pen name Mark Twain, a nom de plume he coined to reflect his time as a river boat pilot.  On the Mississippi in the 1800's it was common to measure river depth in terms of 6 foot increments demarcated on a rope by knots.  Thus, when the river was of depth 12 feet, or two fathoms, the boatmen would call out, "Mark Twain" indicating the second of two knots was submerged.
Qual era o nome real de Mark Twain?
Samuel Langhorne Clemens era conhecido pelo pseudônimo de Mark Twain, um nome que ele cunhou para refletir seu tempo como piloto de barco no rio. No Mississippi, nos anos 1800, era comum medir a profundidade do rio em termos de incrementos de 6 pés demarcados em uma corda por nós.