Peter of Candia, also known as Peter Phillarges, named as Alexander V, was an antipope elected by the Council of Pisa during the Western Schism (1378–1417). He reigned briefly from 26 June 1409, to his death in 1410, in opposition to the Roman pope Gregory XII and the Avignon antipope Benedict XIII. In the 20th century, the Catholic Church reinterpreted the Western Schism by recognising the Roman popes, as legitimate. Gregory XII's reign was extended to 1415, and Alexander V is now regarded as an antipope.

A papal name or pontificial name is the regnal name taken by a pope. Both the head of the Catholic Church, usually known as the pope, and the pope of the Coptic Orthodox Church of Alexandria choose papal names. As of 2013, Pope Francis is the Catholic pope, and Tawadros II or Theodoros II is the Coptic pope. This article discusses and lists the names of Catholic popes; another article has a list of Coptic Orthodox popes of Alexandria.