<ul><li>The distribution of names of popes reveals that the top three most common names are John, Benedict, and Gregory, with Leo and Clement tied for fourth place.</li><li>There have been instances where some popes are listed twice due to disagreements over who held the papal title, similar to Grover Cleveland and Donald Trump appearing twice on the list of US presidents.</li><li>Despite the last pope named John being John XXIII, 21 popes have been named John with the absence of John XX due to a clerical error, and John XVI declared an antipope.</li><li>The information on the frequency of papal names was shared by John D. Cook, and a higher resolution PDF is available for further details.</li></ul>

Frequency of papal names

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