Pope Pius

There have been 12 Popes of the Roman Catholic Church who were named Pius:
*Pope Pius I (c. 140–154, but Vatican lists 142/146 – 157/161)
*Pope Pius II (1458–1464)
*Pope Pius III (1503–1503)
*Pope Pius IV (1559–1565)
*Pope Pius V (1566–1572)
*Pope Pius VI (1775–1799)
*Pope Pius VII (1800–1823)
*Pope Pius VIII (1829–1830)
*Pope Pius IX (1846–1878)
*Pope Pius X (1903–1914)
*Pope Pius XI (1922–1939)
*Pope Pius XII (1939–1958)
*There was also an Antipope Pius XIII who led the tiny breakaway True Catholic Church sect. 
*The Dan Brown novel Angels & Demons takes place after the death of Pius XVI who is succeeded by Pope Luke.
*In the Babylon 5 science fiction saga, Pius XV is a fictional early 22nd Century Pope of the Roman Catholic Church. Pius XV was featured in the novel Dark Genesis.