| Celebration | Name | Saint | Birth | Death |
|---|---|---|---|---|
| 30 of April | Mercurial | Saint Mercurial of Forlí | Italy | |
| 14 of June | Metodio | Saint Metodio of Constantinopla | 847 Turkey | |
| 20 of June | Metodio | Saint Metodio of Olimpo | Turkey | 312 |
| 14 of February | Metodio | Saint Methodius of Thessaloniki | 885 Czech republic | |
| 4 of June | Metrófano | Saint Metrófano of Bizancio | 325 Turkey | |
| 23 of May | Miguel | Saint Miguel of Sinada | 826 Turkey | |
| 22 of April | Miles | Saint Miles | ||
| 3 of December | Mirocles | Saint Mirocles | ||
| 30 of November | Mirocleto | Saint Mirocleto | Italy | 314 Italy |
| 22 of October | Moderano | Saint Moderano of Berceto | 720 France | |
| 17 of December | Modesto | Saint Modesto obispo | Israel | 634 Israel |
| 24 of February | Modesto | Saint Modestus | 480 Belgium | |
| 12 of May | Modoaldo | Saint Modoaldo of Tréveris | France | 647 Germany |
| 25 of June | Moloc | Saint Moloc of Escocia | 592 United kingdom | |
| 25 of March | Mona | Saint Mona, obispo | 300 Italy | |
| 16 of October | Mumolno | Saint Mumolno of Noyon | 680 France | |
| 17 of November | Namacio | Saint Namacio of Vienne | 599 France | |
| 27 of October | Namancio | Saint Namancio of Arvernia | 460 France | |
| 29 of October | Narciso | Saint Narciso of Gerona | Spain | |
| 29 of October | Narciso | Saint Narcissus of Jerusalem | Israel | 222 Israel |
| 27 of August | Narno | Saint Narno of Bérgamo | Italy | |
| 8 of January | Natalán | Saint Natalán | 678 United kingdom | |
| 9 of August | Nateo | Saint Nateo of Achad | Ireland | |
| 20 of November | Nerses | Saint Nerses | ||
| 25 of February | Néstor | Saint Néstor of Magido | 250 Italy | |
| 4 of November | Nicandro | Saint Nicandro of Mira | Italy | |
| 14 of December | Nicasio | Saint Nicasio | Belgium | 407 Belgium |
| 5 of December | Nicecio | Saint Nicecio | ||
| 1 of October | Nicecio | Saint Nicecio of Tréveris | 561 Germany | |
| 8 of February | Nicecio | Saint Nicecio, obispo | 610 France | |
| 2 of April | Nicecio | Saint Nicecio of Lyon | 573 France | |
| 5 of May | Nicecio | Saint Nicecio of Vienne | France | |
| 2 of June | Nicéforo | Saint Nicéforo of Constantinopla | 629 Turkey | |
| 22 of June | Nicetas | Saint Nicetas of Remesiana | Serbia | 414 Serbia |
| 20 of March | Nicetas | Saint Nicetas of Apolonia | 733 Macedonia, the former yugoslav republic of | |
| 6 of December | Nicolás | Saint Nicholas of Bari | Turkey | 345 Turkey |
| 16 of September | Niniano | Saint Niniano of Galloway | 432 United kingdom | |
| 2 of December | Nono | Saint Nono | ||
| 6 of June | Norberto | Saint Norberto of Magdeburgo | 1080 Germany | 1134 Germany |
| 14 of February | Nostriano | Saint Nostriano | 490 Italy | |
| 5 of July | Numeriano | Saint Numeriano of Tréveris | 657 Germany | |
| 7 of July | Odón | Saint Odón of Urgel | 1122 Spain | |
| 6 of March | Olegario | Saint Olegarius | 1137 Spain | |
| 12 of June | Olimpio | Saint Olimpio of Tracia | Turkey | |
| 1 of July | Oliverio | Saint Oliverio Plunkett | 1681 United kingdom | |
| 14 of July | Optaciano | Saint Optaciano of Brescia | Italy | |
| 4 of June | Optato | Saint Optato of Milevi | Algeria | |
| 1 of May | Orencio | Saint Orencio | 440 France | |
| 3 of February | Oscar | Saint Ansgar of Bremen | 865 Germany | |
| 4 of December | Osmundo | Saint Osmundo | United kingdom | 1099 United kingdom |
| 28 of February | Osvaldo | Saint Osvaldo | 992 United kingdom | |
| 2 of July | Otho | Saint Otho of Bamberg | 1060 Germany | 1139 Germany |
| 1 of February | Pablo | Saint Pablo of Saint-Paul-Trois-Châteaux | France | France |
| 8 of February | Pablo | Saint Pablo of Verdún | 647 France | |
| 7 of March | Pablo | Saint Pablo of Prusa | 850 Turkey | |
| 12 of March | Pablo | Saint Pablo Aureliano | France | |
| 22 of March | Pablo | Saint Pablo of Narbona | France | |
| 6 of November | Pablo | Saint Pablo of Constantinopla | 350 Turkey | |
| 9 of March | Paciano | Saint Paciano | 390 Spain | |
| 11 of September | Paciente | Saint Paciente of Lyon | 480 France | |
| 8 of January | Paciente | Saint Paciente | France | |
| 26 of November | Pacomio | Saint Pacomio | ||
| 11 of September | Pafnucio | Saint Paphnutius of Egypt | Egypt | |
| 6 of July | Paladio | Saint Paladio of Escocia | 432 United kingdom | |
| 10 of April | Paladio | Saint Paladio of Auxerre | 658 France | |
| 7 of October | Paladio | Saint Paladio of Saintes | 596 | |
| 8 of July | Pancracio | Saint Pancracio of Taormina | Italy | |
| 28 of April | Pánfilo | Saint Pánfilo of Corfinio | Italy | |
| 17 of April | Pantagato | Saint Pantagato of Vienne | 540 France | |
| 22 of February | Papías | Saint Papías | Turkey | |
| 28 of November | Papiniano | Saint Papiniano y compañeros | ||
| 5 of August | Páride | Saint Páride of Teano | Italy | |
| 7 of February | Partenio | Saint Partenio | Italy | |
| 10 of July | Pascario | Saint Pascario of Nantes | France | |
| 22 of February | Pascasio | Saint Pascasio, bishop | France | |
| 12 of July | Paterniano | Saint Paterniano of Fano | Italy | |
| 15 of April | Paterno | Saint Paterno of Scissy | 565 France | |
| 21 of May | Paterno | Saint Paterno of Dariorige | France | |
| 17 of March | Patricio | Saint Patrick | 385 United kingdom | 461 Ireland |
| 11 of January | Paulino | Saint Paulino of Aquileya | 802 Italy | |
| 22 of June | Paulino | Saint Paulino of Nola | 354 France | 431 Italy |
| 10 of October | Paulino | Saint Paulino of Rochester | 644 United kingdom | |
| 31 of August | Paulino | Saint Paulino of Tréveris | 358 Belgium | |
| 30 of July | Pedro | Saint Pedro Crhysologus | 380 Italy | 450 Italy |
| 2 of August | Pedro | Saint Pedro of Osma | 1109 Spain | |
| 3 of August | Pedro | Saint Pedro of Anagni | 1105 Italy | |
| 14 of September | Pedro | Saint Pedro of Bellevaux | 1174 France | |
| 3 of May | Pedro | Saint Pedro of Argo | 922 Greece | |
| 8 of May | Pedro | Saint Peter of Tarantasia | 1102 France | 1174 France |
| 21 of February | Pedro | Saint Peter Damian | 1007 Italy | 1072 Italy |
| 4 of March | Pedro | Saint Pedro, abad | 1123 | |
| 26 of March | Pedro | Saint Pedro, obispo | Armenia | |
| 4 of April | Pedro | Saint Pedro of Poitiers | France | 1115 France |
| 25 of November | Pedro | Saint Pedro obispo y mártir | Egypt | 311 Egypt |
| 6 of January | Pedro | Saint Pedro Tomás | 1366 Cyprus | |
| 16 of May | Peregrino | Saint Peregrino of Auxerre | France | |
| 30 of December | Perpetuo | Saint Perpetuo obispo | 491 France | |
| 4 of November | Perpetuo | Saint Perpetuo of Maastrich | 620 France | |
| 6 of May | Petronaco | Saint Petronaco | Italy | 725 Italy |
| 10 of January | Petronio | Saint Petronio | 463 France |