Philosophical skepticism is identified by several signs or names: Aporētikoí, Ephektikoí, Pyrrhōneioi, Skeptikoí and Zētētikoí, with significant all of them valid and some confusion in meaning. The objective of this work is threefold: first, to clarify why some of these names have been more successful than others, second, what are the reasons why one of them has been fixed as a name, in general for all belonging to this philosophical movement, and third to what is due that recognizing the tradition (...) a clear initiator, Pirrón de Elis, and being the name "Pirrónicos" one of the most popular and one of the most used by the writers who speak about this movement, has not been the most successful, as it has been traditional in most other doctrines. (shrink)