There had been another Pope John XXIII many years back. Many considered him to have been an antipope so by taking that name Roncalli put the question to rest forever. He may have had other reasons for choosing the name also, but this was the most telling. Anyone knowing something of the papal history would have caught the link immediately.
Pope John XXIII's birth name is Angelo Giuseppe Roncalli.
Pope Francis was born Jorge Mario Bergoglio.
As Cardinal Angelo Giuseppe Roncalli Pope John XXIII was the Patriarch of Venice.
Angelo Giuseppe Roncalli was born November 25, 1881, at Sotto il Monte, Bergamo, Kingdom of Italy.
Maurice Demarle has written: 'Mon Ami Angelo Giuseppe Roncalli, Nonce Apostolique, le Futur Jean XXIII'
Pope John XXIII, Antonio Cardinal Roncalli, was elected to the papacy following Pope Pius XII.
Roman Catholic AnswerAngelo Roncalli, aka Pope Blessed John XXIII, left several lasting contributions to the Church, but, obviously, the best known is Vatican Council II, the council he called "to blow the cobwebs out of the Church".
Pope Paul VI, 21 June 1963 to 6 August 1978.Between 1410-1415 there was an antipope John (Baldassare) XXIII. He, in his youth, had been a bona fide pirate!By taking the name John XXIII, Angelo Roncalli confirmed that Baldassare had indeed been an antipope.VaticanI took place about 150 years age
There is no pope named Pope XXIII. If you are referring to Pope John XXIII, he became pope in 1958.
That was Pope John-Paul I, but he died after only 34 days in office.
As a Roman numeral xxiii or XXIII = 23
XXIII is 23