Papal Names

Why Popes Take New Names

A papal name expresses continuity, patronage, gratitude, program, or spiritual aspiration. It is not a second sacrament or a legal erasure of the pope’s baptismal identity.

The name can honor a predecessor, saint, religious founder, family tradition, council, reform movement, or pastoral priority. Its meaning is best established by the pope’s own explanation rather than speculation.

The title becomes the ordinary public designation of the pontificate, while the secular name remains historically relevant.

Peter: A Name Given by Christ

The first pope did not choose a regnal name after election. Jesus Himself renamed Simon as Cephas or Peter, revealing his vocation as rock and shepherd.

Later papal naming developed from different historical circumstances, but every papal name stands beneath the foundational renaming of Peter by Christ.

No later pope has chosen the regnal name Peter. This is a powerful custom of reverence rather than a known universal legal prohibition.

John II and the First Clear Change of Name

Pope John II, elected in AD 533, was born Mercurius. Because his birth name referred to a pagan deity, he adopted the name John upon becoming pope.

Earlier bishops of Rome generally retained their birth names, though the evidence for some ancient names is limited. John II’s change is widely treated as the first clear papal regnal-name adoption.

The practice remained irregular for centuries before becoming customary.

When the Custom Became Regular

From the late tenth and eleventh centuries, new papal names became increasingly common. Popes of German or non-Roman background sometimes selected names familiar within the Roman succession.

By the high Middle Ages, choosing a papal name had become an expected part of acceptance.

The choice remains free. A pope can retain his birth name, but recent centuries have made a new name the normal public expectation.

Major Papal Name Families

• John: associated with the Apostle and Evangelist, John the Baptist, and a long Roman tradition.
• Gregory: often evokes St. Gregory the Great, reform, mission, learning, or governance.
• Benedict: can honor St. Benedict, Benedictine spirituality, peace, or earlier Benedicts.
• Leo: recalls St. Leo the Great, doctrinal courage, and in modern times Leo XIII’s social teaching.
• Pius: emphasizes piety and continuity with earlier reforming or doctrinal popes.
• Innocent: originally a personal Roman name that became a repeated papal name.
• Clement: evokes St. Clement I and apostolic Roman continuity.
• Urban: a Roman name later associated with reform and missionary or crusading history.
• Paul: honors the Apostle to the Gentiles and missionary service.
• John Paul: a modern combined name honoring St. John XXIII and St. Paul VI.

The Most Frequently Used Names

John is traditionally the most frequently used papal name, though numbering complications make the total appear confusing. Gregory, Benedict, Clement, Innocent, Leo, and Pius also recur often.

Name frequency does not imply uninterrupted theological or political continuity. Different popes can choose the same name for different reasons and govern under radically different conditions.

The A–Z directory should group names while preserving unique pope numbers.

Why Papal Numbers Become Complicated

Numbers were not used consistently from the beginning. As repeated names multiplied, later cataloguers retroactively numbered earlier popes.

A medieval mistake concerning the Johns produced a nonexistent John XX, so the next pope used John XXI. Confusion over Felix II, Stephen, and Anacletus or Cletus affected other older lists.

Modern pages should follow the official Vatican numbering and explain historical variants in notes.

John Paul I and the First Double Name

In 1978 Albino Luciani chose John Paul I to honor St. John XXIII and St. Paul VI. The name signaled continuity with the Second Vatican Council and the ministries of both predecessors.

Karol Wojtyła then chose John Paul II, preserving the combined name and the immediate program of continuity.

The Roman numeral I was used from the beginning because the new form was intended as a papal name capable of succession.

Francis: A New Papal Name

Jorge Mario Bergoglio chose Francis in 2013, the first pope to bear the name. He explained the choice through St. Francis of Assisi and the call not to forget the poor.

Because no predecessor had used the name, he is properly called Pope Francis without the numeral I unless a future pope also chooses Francis.

The choice illustrates how a name can establish a clear pastoral emphasis without creating new doctrine.

Why Pope Leo XIV Chose His Name

Robert Francis Prevost chose Leo XIV after his election on May 8, 2025. He explained that the principal reason was Pope Leo XIII and the encyclical Rerum Novarum.

Leo XIII addressed the social disruptions of the first industrial revolution. Leo XIV connected that precedent with contemporary challenges involving artificial intelligence, robotics, labor, justice, and human dignity.

The name therefore signals both historical continuity and a pastoral lens for new social conditions.

How the Name Is Chosen and Announced

After a valid election, the senior cardinal asks whether the elected person accepts. After acceptance, he is asked by what name he wishes to be called.

The chosen Latin form is used in the public announcement from the central balcony of St. Peter’s Basilica.

There is no public list of reserved names, but the choice should respect the Church’s faith, history, and dignity.

Editorial Rules for CatholicG33k

• Use the official papal form and Roman numeral.
• Use “St.” or “Blessed” only when recognized by the Church.
• Do not add “I” to a unique papal name unless official usage did so, as with John Paul I.
• Preserve variant historical forms in notes: Callistus or Calixtus, Sixtus or Xystus, Hadrian or Adrian.
• Do not infer a full program from a name before the pope explains it.
• Distinguish regnal name from secular name, religious name, and episcopal motto.
• Follow the Vatican official list for numbering.

Religious Names, Birth Names, and Papal Names

A pope who belonged to a religious order may already have used a religious name before election. The papal name remains a distinct public choice connected with the new office.

Biographical profiles should record the birth name, religious name where applicable, episcopal motto, and papal name without collapsing them into one field.

Names can change across languages, so official Latin, familiar English, and historically accurate local forms should be cross-referenced.

Common Misconceptions

“Every pope must choose a new name by divine law”

The practice is a historical custom, not the substance of the papal office.

“No pope may ever choose Peter”

The avoidance is a strong tradition of reverence, not a clearly defined universal prohibition.

“A papal name reveals every future policy”

It suggests intention or patronage but does not replace study of actual acts.

“Francis should automatically be called Francis I”

A unique papal name ordinarily receives no numeral unless another pope later uses it.

“The numbering system has always been exact”

Ancient catalogues and later counting errors created several irregularities.

Key Takeaways

• Peter’s name was given by Christ, while later papal names developed as a custom.
• John II is commonly identified as the first pope clearly to adopt a new name.
• The custom became regular in the later first millennium.
• Numbering reflects historical catalogues and sometimes preserves old mistakes.
• Pope Leo XIV linked his name especially to Leo XIII and modern social questions.

Related CatholicG33k Resources

Prayer

Lord Jesus, Thou knowest each servant by name and didst call Simon Peter.

Grant every successor of Peter a name worthy of his mission and, more importantly, a life faithful to the Gospel signified by that name.

Amen.

Selected Sources and Further Reading

• John 1:40–42 and Matthew 16:13–19, Douay-Rheims.
• Vatican official list of Supreme Pontiffs.
• Official biographies and election announcements of recent popes.
• Pope Leo XIV, address to the College of Cardinals, May 10, 2025.
• Pope Francis, explanations of his choice of name.
• Catholic Encyclopedia, articles on individual popes and the List of Popes.
• Rupert Matthews, The Popes: Every Question Answered.
• William J. La Due, The Chair of Saint Peter.