In the Odyssey, Odysseus gives the Cyclops an explicit detail about his name; he tells the Cyclops his real name is "Nobody". Odysseus and his crew are trapped inside the Cyclops' cave, so in order to escape, Odysseus comes up with a plan. Odysseus gets the Cyclops drunk and tells him his real name is "Nobody", so when he attacks him to escape, the Cyclops will scream he's being attacked by "Nobody". And so it happens, Odysseus blinds the drunk Cyclops with a piece of wood and when the Cyclops' men come to the rescue, the Cyclops replies that he's being attacked by "Nobody", so his men leave, thinking that he is just not well, enabling Odysseus and his crew to escape.
