| Celebration | Name | Saint | Birth | Death |
|---|---|---|---|---|
| 24 of October | Antonio María | Saint Anthony Mary Claret | 1807 Spain | 1870 France |
| 30 of December | Anysia | Saint Anysia of Thessalonica | 406 | |
| 8 of January | Apollinaris | Saint Apollinaris | Turkey | |
| 20 of July | Apollinaris | Saint Apollinaris of Ravenna | Italy | |
| 15 of September | Aprus | Saint Aprus of Toul | France | |
| 26 of October | Aptonius | Saint Aptonius of Anguleme | 567 France | |
| 19 of October | Aquilinus | Saint Aquilinus of Evreux | 690 France | |
| 21 of July | Arbogast | Saint Arbogast of Strasbourg | France | |
| 26 of December | Archelaus | Saint Archelaus bishop | ||
| 10 of January | Archon | Saint Archon | 745 France | |
| 1 of May | Arigius | Saint Arigius of Gap | France | 604 France |
| 3 of September | Aristeus | Saint Aristeo bishop | ||
| 18 of July | Arnulf | Saint Arnulf of Metz | 640 France | |
| 14 of August | Arnulf | Saint Arnulf of Soissons | 1087 Netherlands | |
| 19 of September | Arnulf | Saint Arnulf of Gap | 1075 France | |
| 19 of January | Arsenius | Saint Arsenius bishop | Greece | |
| 6 of October | Artaldus | Saint Artaldus of Arvières | 1206 France | |
| 14 of April | Asacus | Saint Asacus | Ireland | |
| 1 of May | Asaph | Saint Asaph | United kingdom | |
| 18 of October | Asclepíades | Saint Asclepíades of Antioch | 218 Syrian arab republic | |
| 3 of August | Asprenato | Saint Asprenato of Naples | Italy | |
| 10 of June | Asterius | Saint Asterius of Petra | ||
| 2 of May | Atanasio | Saint Athanasius | 297 Egypt | 373 Egypt |
| 15 of July | Athanasius | Saint Athanasius of Naples | Italy | 872 Italy |
| 7 of November | Athebodore | Saint Athenodore of Neocesarea | 304 Italy | |
| 5 of October | Atilano | Saint Atilano of Zamora | 916 Spain | |
| 22 of May | Atto | Saint Atto of Pistoia | 1153 Italy | |
| 13 of December | Aubert | Saint Aubert | France | 670 France |
| 1 of March | Aubin | Saint Aubin of Anjou | 550 France | |
| 16 of May | Audas | Saint Audas, bishop and martyr | 375 Iran | |
| 24 of August | Audoen | Saint Audoen of Rouen | 684 France | |
| 1 of November | Audomar | Saint Audomar of Thérouanne | 670 Netherlands | |
| 26 of January | Augustine | Saint Augustine Erlandsön | 1188 Norway | |
| 30 of April | Aulus | Saint Aulus | France | |
| 16 of June | Aurelian | Saint Aurelian of Arles | 551 France | |
| 20 of July | Aurelius | Saint Aurelius of Carthage | 430 Tunisia | |
| 16 of June | Aureus | Saint Aureus and martyr companions | Belgium | |
| 22 of May | Ausonius | Saint Ausonius of Angulema | France | |
| 8 of July | Auspice | Saint Auspice of Toul | Belgium | |
| 26 of July | Austindus | Saint Austindus | 1068 France | |
| 20 of May | Austregisilus | Saint Austregisilus | 624 France | |
| 1 of November | Austremoine | Saint Austremoine of Avernia | France | |
| 10 of September | Autbert | Saint Autbert of Avranches | 725 France | |
| 12 of September | Autonomus | Saint Autonomus of Bithynia | Turkey | |
| 5 of February | Avitus | Saint Avitus | 518 France | |
| 19 of February | Barbatus | Saint Barbatus | 682 Italy | |
| 22 of January | Barnard | Saint Bernard | 842 France | |
| 15 of October | Barses | Saint Barses of Edesa | 379 Syrian arab republic | |
| 30 of January | Barsimeus | Saint Barsimeus of Edessa | Turkey | |
| 27 of October | Bartholomew | Saint Bartholomew of Bregantia | 1270 Italy | |
| 12 of April | Basil | Saint Basil of Pario | 735 Greece | |
| 27 of November | Basil | Saint Basil bishop | ||
| 26 of April | Basil | Saint Basil | 322 Italy | |
| 2 of January | Basilio | Saint Basil the Great | 330 Turkey | 379 Turkey |
| 2 of January | Basilio | Saint Gregory of Nizianzus | 389 Turkey | |
| 22 of May | Basilisk | Saint Basilisk of Comana | Turkey | |
| 4 of March | Basinus | Saint Basinus | 705 Germany | |
| 19 of January | Bassianus | Saint Bassianus | 409 Italy | |
| 5 of December | Bassus | Saint Bassus | ||
| 10 of November | Baudolinus | Saint Baudolinus of Alexandria | Italy | 740 Italy |
| 26 of October | Bean | Saint Bean of Mortlach | 1032 United kingdom | |
| 26 of November | Belino | Saint Belino | Italy | 1151 Italy |
| 11 of March | Benedict | Saint Benedict of Milán | 725 Italy | |
| 22 of November | Benignus | Saint Benignus of Milan | Italy | 470 Italy |
| 16 of June | Benon | Saint Benon | 1106 Germany | |
| 22 of March | Benvenutus | Saint Benvenutus Scotivoli | 1282 Italy | |
| 4 of December | Bernard | Saint Bernard cardinal | Italy | 1133 Italy |
| 25 of October | Bernardo | Saint Bernardo Calbó | 1243 Spain | |
| 19 of July | Bernold | Saint Bernold of Utrech | 1054 Netherlands | |
| 20 of November | Bernward | Saint Bernward of Hildesheim | 1022 Germany | |
| 11 of November | Berthuin | Saint Berthuin of Malonne | 698 France | |
| 16 of October | Bertran | Saint Bertran of Comminges | 1123 France | |
| 30 of June | Bertrand | Saint Bertrand | 553 France | 623 France |
| 2 of August | Betharius | Saint Betharius of Chartres | 623 France | |
| 22 of April | Bicor | Saint Bicor | ||
| 23 of June | Bilius | Saint Bilius of Vannes | 914 France | |
| 3 of December | Birinus | Saint Birinus | United kingdom | 650 United kingdom |
| 10 of August | Blane | Saint Blane of Dumblan | United kingdom | |
| 3 of February | Blas | Saint Blaise | Armenia | 316 Armenia |
| 10 of June | Bogumilus | Saint Bogumilus of Gniezno | 1116 Poland | 1182 Poland |
| 27 of September | Bonfilius | Saint Bonfilius of Fara | 1115 Italy | |
| 5 of June | Boniface | Saint Boniface of Crediton | 672 United kingdom | 754 Netherlands |
| 19 of February | Boniface | Saint Boniface of Lausanne | 1260 Belgium | |
| 15 of January | Bonnet | Saint Bonnet | 710 France | |
| 17 of February | Bonose | Saint Bonose | 373 Belgium | |
| 26 of March | Braulio | Saint Braulio of Zaragoza | 590 Spain | 651 Spain |
| 25 of January | Bretannio | Saint Bretannio | Ukraine | |
| 13 of November | Brice | Saint Brice of Tours | 444 France | |
| 1 of May | Brieuc | Saint Brieuc | United kingdom | France |
| 6 of February | Brinolf | Saint Brinolf Algotsson | 1317 Sweden | |
| 5 of May | Britton | Saint Britton of Trier | 386 Belgium | |
| 27 of May | Bruno | Saint Bruno of Wurzburg | 1045 Germany | |
| 18 of July | Bruno | Saint Bruno of Segni | 1123 Italy | |
| 11 of October | Bruno | Saint Bruno of Lotaringia | 965 Germany | |
| 2 of February | Buchard | Saint Buchard | United kingdom | 754 Germany |
| 15 of July | Buenaventura | Saint Bonaventure | 1221 Italy | 1274 France |
| 27 of August | Caesarius | Saint Caesarius of Arles | 542 France | |
| 6 of September | Cagnoald | Saint Cagnoald of Laon | 632 France | |
| 27 of September | Caius | Saint Caius of Milan | ||
| 4 of September | Caletric | Saint Caletric of Chartres | 573 France |