Proper noun
(card games) The nine of trumps in the game of Sancho Pedro.
An assistant or sidekick, from Cervantes’ Sancho Panza.
Source: en.wiktionary.orgEvery autobiography is concerned with two characters, a Don Quixote, the Ego, and a Sancho Panza, the Self. W. H. Auden
Don Quixote's misfortune is not his imagination, but Sancho Panza. Franz Kafka
Since Don Quixote de la Mancha is a crazy fool and a madman, and since Sancho Panza, his squire, knows it, yet, for all that, serves and follows him, and hangs on these empty promises of his, there can be no doubt that he is more of a madman and a fool than his master. Miguel de Cervantes
Sancho Panza by name, is my own self, if I was not changed in my cradle. Miguel de Cervantes
God bless the man who first invented sleep!" So Sancho Panza said, and so say I. John Godfrey Saxe
After defeating king Sancho Garcés I of Navarre and the king of Leon at Valdejunquera on 26 July, he penetrated into Navarre, overcoming Aragon by the classic route of the invasions from the south. Source: Internet