| Celebration | Name | Saint | Birth | Death |
|---|---|---|---|---|
| 1 of July | Aarón | Saint Aaron | Egypt | Egypt |
| 1 of July | Aarón | Saint Aarón of Carlon | 304 United kingdom | |
| 16 of March | Abraham | Saint Abraham Kidunaia | Turkey | 367 Turkey |
| 11 of July | Abundio | Saint Abundio of Córdoba | 854 Spain | |
| 27 of November | Acacius | Saint Acacius martyr | ||
| 23 of September | Adamnan | Saint Adamnan of Hy | 704 United kingdom | |
| 14 of November | Adeltrude | Saint Adeltrude | ||
| 20 of October | Aderald | Saint Aderald of Troyes | 1002 France | |
| 7 of April | Aibert | Saint Aibert | 1140 Belgium | |
| 22 of April | Aitala | Saint Aitala | ||
| 29 of September | Alaric | Saint Alaric of Ufnau | Switzerland | |
| 14 of November | Alberic | Saint Alberic | ||
| 18 of August | Alberto | Saint Alberto Hurtado | 1901 Chile | 1952 Chile |
| 23 of October | Alberto | Saint Alberto Hurtado Cruchaga | 1901 Chile | 1952 Chile |
| 7 of August | Alberto | Saint Alberto degli Abbati | 1306 Italy | |
| 1 of December | Alexander | Saint Alexander Briant | United kingdom | 1581 United kingdom |
| 6 of February | Alfonso | Saint Alfonso María Fusco | 1910 Italy | |
| 19 of September | Alonso | Saint Alonso of Orozco | 1500 | 1591 Spain |
| 30 of June | Alpinianus | Saint Alpinianus of Limoges | France | |
| 18 of October | Amabilis | Saint Amabilis of Riom | France | |
| 13 of September | Amatus | Saint Amatus of Sens | 629 France | |
| 14 of June | Anastasio | Saint Anastasius of Cordoba | Spain | 853 Spain |
| 11 of October | Anastasius | Saint Anastasius of Schemaris | 666 | |
| 21 of December | Anastasius | Saint Anastasius martyr | ||
| 24 of November | Andrés | Saints Andrés Dung Lac y compañeros | 1839 | |
| 10 of November | Andrés | Saint Andrew Avellino | 1521 Italy | 1608 Italy |
| 20 of September | Andrés | Saint Andrew Kim Taegon and companions | 1846 Korea, republic of | |
| 13 of May | Andrés | Saint Andrew Hubert Fournet | 1752 France | 1834 France |
| 16 of May | Andrew | Saint Andrew Bobola | 1591 Poland | 1657 Poland |
| 23 of September | Andrew | Saint Andrew Fournet | 1752 France | 1834 France |
| 14 of November | Andronicus | Saint Andronicus | ||
| 5 of May | Angelo | Saint Angelo of Sicilia | 1225 Italy | |
| 6 of February | Angelo | Saint Angelo of Furcio | 1327 | |
| 24 of September | Anthony | Saint Anthony González | Spain | 1637 Japan |
| 19 of October | Anthony | Saint Anthony Daniel | 1648 Canada | |
| 5 of July | Anthony Mary | Saint Anthony Mary Zaccaria | 1502 Italy | 1539 Italy |
| 13 of June | Antonio | Saint Anthony of Padua | 1195 Portugal | 1231 Italy |
| 12 of January | Antonio | Saint Antonio María Pucci | 1892 Italy | |
| 23 of December | Antonio | Saint Anthony of Saint Anne Galvão | 1739 Brazil | 1822 Brazil |
| 10 of April | Apollonius | Saint Apollonius of Alexandria | Egypt | |
| 4 of December | Aprus | Saint Aprus | France | France |
| 7 of March | Ardon | Saint Ardon Smaragdus | 843 Italy | |
| 21 of April | Aristo | Saint Aristus of Alexandria | Egypt | |
| 15 of January | Arnold | Saint Arnold Janssen | 1837 Germany | 1909 Netherlands |
| 16 of July | Athenogenes | Saint Athenogenes | 305 Armenia | |
| 7 of May | Augustin | Saint Augustin Roscelli | 1818 Italy | 1902 Italy |
| 21 of March | Augustine | Saint Augustine Zhao Rong | 1815 China | |
| 24 of November | Augustine | Saint Augustine Schoeffler | 1851 Viet nam | |
| 1 of March | Augustus | Saint Augustus Chapdelaine | France | 1856 China |
| 30 of June | Austriclinian | Saint Austriclinian of Limoges | France | |
| 31 of December | Barbatian | Saint Barbatian | Italy | |
| 22 of March | Basil | Saint Basil of Ancira | 362 Turkey | |
| 19 of February | Beatus | Saint Beatus of Liébana | 802 Spain | |
| 9 of May | Beatus | Saint Beatus of Vendôme | France | |
| 25 of May | Beda | Saint Bede the Venerable | 672 United kingdom | 735 United kingdom |
| 24 of April | Benedict | Saint Benedict Menni | 1914 France | |
| 23 of October | Benedict | Saint Benedict of Herbauge | France | |
| 13 of February | Benigno | Saint Benignus of Todi | France | France |
| 1 of November | Benignus | Saint Benignus of Dijon | France | |
| 16 of January | Berard | Saint Berard | 1226 Morocco | |
| 15 of June | Bernard | Saint Bernard of Menthone | 1081 France | |
| 20 of May | Bernardino | Saint Bernardine of Siena | 1380 Italy | 1444 Italy |
| 2 of January | Bladulf | Saint Bladulf | 630 Italy | |
| 10 of May | Calepodius | Saint Calepodius presbyterian | ||
| 13 of November | Callistus | Saint Callistus Caravario | 1903 Italy | 1930 China |
| 14 of July | Camilo | Saint Camille de Lelis | 1550 Italy | 1614 Italy |
| 13 of April | Caradoc | Saint Caradoc | 1124 United kingdom | |
| 13 of February | Castor | Saint Castor of Aquitaine | Germany | |
| 7 of August | Cayetano | Saint Cajetan of Thiene | 1480 Italy | 1547 Italy |
| 3 of June | Cecilius | Saint Cecilius of Carthage | Tunisia | |
| 4 of July | Cesidio | Saint Cesidio Giacomantonio | 1900 China | |
| 19 of October | Charles | Saint Charles Garnier | Canada | 1649 Canada |
| 22 of April | Chrysotelus | Saint Chrysotelus | ||
| 11 of July | Cindeus | Saint Cindeus of Pamphylia | ||
| 8 of November | Clarus | Saint Clarus of Tours | 397 France | |
| 15 of February | Claude | Saint Claude La Colombière | 1682 France | |
| 15 of March | Clemens | Saint Clemens Maria Hofbauer | 1820 Austria | |
| 7 of September | Clodoald | Saint Clodoald | 560 France | |
| 8 of July | Coloman | Saint Coloman of Turingia | 689 Germany | |
| 21 of May | Cristóbal | Saint Christopher Magallanes and companions | 1869 Mexico | 1927 Mexico |
| 30 of November | Cuthbert | Saint Cuthbert Mayne | United kingdom | 1577 United kingdom |
| 4 of May | Cyriacus | Saint Cyriacus presbyter and martyr | ||
| 10 of May | Damián | Saint Damien of Molokai | 1840 Belgium | 1889 United States |
| 12 of April | David | Saint David Uribe | Mexico | |
| 27 of August | David | Saint David Lewis | 1616 United kingdom | 1679 United kingdom |
| 30 of January | David | Saint David Galván | 1915 Mexico | |
| 19 of July | Dius | Saint Dius Thaumaturge | Turkey | |
| 12 of May | Domingo | Saint Dominic de la Calzada | 1019 Spain | 1109 Spain |
| 8 of August | Domingo | Saint Dominic of Guzman | 1170 Spain | 1221 Italy |
| 14 of October | Domingo | Saint Domingo Loricato | 1060 Italy | |
| 18 of September | Domingo | Saint Domingo Trach | 1840 Viet nam | |
| 5 of November | Domingo | Saint Domingo Mau | 1858 Viet nam | |
| 26 of November | Domingo | Saint Domingo Nguyen Van Xuyên | Viet nam | 1839 Viet nam |
| 2 of April | Domingo | Saint Domingo Tuoc | 1839 Viet nam | |
| 11 of March | Domingo | Saint Domingo Câm | 1859 China | |
| 19 of August | Donatus | Saint Donatus of Sisteron | France | |
| 28 of August | Edmund | Saint Edmund Arrowsmith | 1585 United kingdom | 1628 United kingdom |
| 10 of December | Edmund | Saint Edmund Gennings | United kingdom | 1591 United kingdom |
| 1 of December | Edmund Campion | Saint Edmund Campion | United kingdom | 1581 United kingdom |
| 24 of April | Egbert | Saint Egbert | 729 United kingdom |