""Caveirinha" which translates from Portuguese "little/small skull", The name became part of Aldo's life, right at the start of his jiu jitsu career. Januário was small and skinny as a child and trained in the adult's class, for that reason, some of his training partners started using that nickname. There was also an episode, when a friend silk-screened a skull on Aldo's gi jacket; seeing that Januário's teammate, Helio "Soneca" emphasised the "Caveirinha" name."