Piero Folli – Italian antifascist parish priest Joseph Freinademetz – Missionary to China, canonized Mariano Gagnon – Franciscan friar and author who helped indigenous people resist the Shining Path in Peru Georg Gänswein – Secretary to Pope Benedict XVI Augustine Geve – Solomon Islands Catholic priest and politician, murdered in 2002 Lionel Groulx – French Canadian Nationalist Jacques Hamel – Priest killed in the 2016 Normandy church attack.
Ignatius of Loyola – Founder of the Society of Jesus Saint Arnold Janssen – Missionary Marcelline Jayakody, Sri Lankan Sinhala author, composer of hymns, author, journalist Francis Kilcoyne (died 1985) – President of Brooklyn College Georges-Henri Lévesque – Sociologist Gerard Timoner III – The current master of the Dominican Order Eustáquio van Lieshout – Missionary in Brazil Michael J. McGivney – Founder of the Knights of Columbus Claudio Monteverdi – Italian composer Columba Murphy – Involved in gaining an Edict of Toleration for Hawaiian Catholics Nemesi Marqués Oste – Rector in Andorra and political figure there William Pope – One of John Henry Newman's converts: seceded from Anglicanism to the Church of Rome in 1853 Jean-Baptiste de La Salle – A founder of the Institute of the Brothers of the Christian Schools Mihalj Šilobod Bolšić – Roman Catholic priest, mathematician, writer, and musical theorist primarily known for writing the first Croatian arithmetic textbook Arithmatika Horvatzka (published in Zagreb, 1758) David Michael Moses – American priest and musician Thomas Joseph White – American priest and bluegrass musician.
Ghevont Alishan – Priest of the Armenian Catholic Church who designed Armenia's first modern flag.
Louis Massignon – Scholar of Islam who transferred to the Melkite Greek Catholic Church after converting to Catholicism and later became a priest.
Alphonse Mingana – Chaldean Catholic Church priest and Orientalist.