| Caecilius of Carthage, Priest who converted Cyprian, who took care of his wife and children after Caecilius died |
| Caesarius of Armenia, Martyr |
| Caesarius of Terracina, Deacon and Martyr |
| Caesarius, Archbishop of Arles |
| Caetano Errico, Priest, Founder of the Missionaries of the Sacred Heart |
| Caimin, Abbot of Lough Derg in Ireland |
| Caius, Pope and Martyr |
| Cajetan (Gaetano), Co-founder of the Clerics Regular, Theatines |
| Calepodius of Rome, Priest and Martyr |
| Calliope of Lerma, Spain, Martyr |
| Calliopus of Perge, Martyr |
| Callista of Cappadocia, Martyr, Companion of St. Dorothy |
| Callistratus, Martyred in Chalcedon |
| Callistus Calvario, Salesian Priest, Martyred in China |
| Callistus I, Pope and Martyr |
| Callistus of Corinth, Martyr |
| Callistus, Bishop of Todi and Martyr |
| Calminius, Co-founder of Three French Abbeys |
| Calocerus of Rome, Imperial Eunuch, Martyr |
| Calogero of Sicily, Hermit |
| Camilla Battista da Varano, Poor Clare Abbess |
| Camillus de Lellis, Priest, Founder of the Camillans |
| Candida, Roman Virgin and Martyr |
| Candidus, Martyr |
| Candidus, Martyr |
| Candidus, Martyr |
| Candidus, Martyr of Alexandria |
| Canice, Irish Abbot of Kilkenny |
| Canio, Bishop of Atelle (Compania), Martyred by Vandals |
| Canute IV, King of Denmark and Martyr |
| Caprasius of Lerins, Hermit |
| Caprasius, Bishop of Agen and Martyr |
| Caradoc, Welsh Nobleman, Harpist and Hermit |
| Carantoc, Bishop of Cardigan, Wales |
| Caraunus (Cheron) of Chartres, Deacon and Martyr |
| Carileffus of Menat, Monk in Auvergne |
| Carilippus of Languedoc, Martyr |
| Carisima of Albi, Martyr |
| Carl Steeb, Priest, Founder of the Sisters of Mercy of Verona |
| Carla Ronci |
| Carlo Acutis, Patron of Youth and of Computer Programmers |
| Carlo Gnocchi, Italian Priest, Chaplain, Educator |
| Carlo Liviero, Bishop of Citá di Castello, Founder of the Little Brothers of the Sacred Heart |
| Carlos Manuel Rodriguez Samtoago. Layman, First Beatified Puerto Rican |
| Carmelite nuns from the Cloister of Compiégne, who were guillotined in Paris on July 1 7, 1794 (two relics from the clothing of the 16 nuns) |
| Carmen Sallas y Barangueras, Founder, Conceptionist Sisters of Education, strong supporter of women’s rights |
| Carthage of Lismore |
| Casaria, |
| Casilda of Toledo, Martyr |
| Casimir, Prince of Poland, Patron of Poland and Lithuania |
| Cassianus of Imola, Martyr |
| Cassianus, Bishop of Todi, Martyr |
| Cassianus, Martyr |
| Cassius, Bishop of Narni |
| Castor of Aquitaine (of Karden), Priest, Hermit |
| Castor of Tarsus, Martyr |
| Castrense, Bishop of Castel Volturno, Martyr |
| Castricianus, Bishop of Milan |
| Castulus, Martyr |
| Catherine dei Ricci, Dominican Mystic |
| Catherine Labouré, Daughter of Charity, Saw Our Lady of the Miraculous Medal |
| Catherine of Alexandria, Virgin and Martyr |
| Catherine of Bologna, Poor Clare Abbess |
| Catherine of Genoa, Widow, Mystic |
| Catherine of Siena, Dominican Mystic and Doctor of the Church |
| Catherine of St. Augustine (Catherine de Simon de Longpre), Augustinian foundress of the Hotel Dieu in Quebec |
| Catherine of Sweden, Nun, Daughter of Brigit of Sweden |
| Catherine Thomas (Catalina Tomas) of Palma, Augustinian Canoness |
| Catherine Volpicelli, Foundress of the Institute of the Handmaids of the Sacred Heart |
| Cayetana of Alexandria, Virgin and Martyr |
| Cecilia Cesarini, Dominican Nun |
| Cecilia of Rome, Virgin and Martyr |
| Ceferino, Martyr |
| Celedonius, Soldier and Martyr |
| Celerinus, African Martyr |
| Celestine V (Peter of Morone), the first of only two Popes who have retired |
| Celestine, Martyr |
| Celsus, Martyr |
| Censurius, Bishop of Auxerre |
| Ceolfrid (Geolfridus), Abbot of Jarrow and Wearmouth, Teacher of Bede the Venerable |
| Cera (Keira) of Kileary, Irish Abbess |
| Cerbonius, Bishop of Piombino |
| Cerbonius, Bishop of Verona |
| Ceronatus, Martyr |
| Cesare Baronio (Baronius), Roman Cardinal, Church Historian |
| Cetteus. Bishop of Amiternun, Patron of Pescara |
| Chad (Caeda) of Mercia, Archbishop of York, Bishop of Lichfield |
| Charbel (born Abdullah Youssef) Makhlouf, Maronite Hermit |
| Chariton, Hermit |
| Charles Borromeo, Cardinal Archbishop of Milan |
| Charles de Foucauld, Cistercian Priest, Martyr |
| Charles Garnier, Jesuit Priest, North American Martyr |
| Charles Houben of Mount Argus, Passionist Brother |
| Charles Lwanga, One of the Martyrs of Uganda |
| Charles of Sezze (Giancarlo Marchione), Franciscan Lay Brother, Stigmatist |
| Charles the Good, Count of Flanders, Martyr |
| Chelidonia, Benedictine Hermitess |
| Chionia of Thessaloniki, Virgin and Martyr |
| Christiana of Lucca, (Oringa of the Cross), Augustinian Nun |
| Christina of Bolsena, Virgin and Martyr |
| Christina, Virgin Martyred in Persia |
| Christopher of Lycia, Martyr |
| Christotelus, Martyr |
| Chrysanthus, Egyptian, martyred in Rome with his Greek wife, Daria |
| Chrysogonus, Bishop of Aquilea, Martyr |
| Chrysolius (Chrysole) Armenian Bishop Martyred in Flanders c. 300 |
| Ciaran (Kieran), Abbot of Clonmacnois, Ireland |
| Ciaran (Kieran), Abbot of Saighir, Ireland |
| Cireneus of Spoleto |
| Cirilo Bertran (Jose Sanz Tejedor), Superior of Christian Brothers of Turon, Martyred in Spain in 1934 |
| Clara Gambacorta, Dominican Nun, the Dominican “Teresa” |
| Clare of Assisi, Foundress of the Poor Clares, Clarissas |
| Clare of Montefalco, Augustinian Nun |
| Clarentius, Bishop of Vienne |
| Clarus (Clair), Bishop of Nantes |
| Clarus of Vienne, Abbot of St. Marcel |
| Claude Chevrier, French Vincentian Priest Martyred in China in 1870 |
| Claude de la Colombiere, Jesuit Priest, Spiritual Director of St. Margaret Mary |
| Claudia, Virgin, Martyred at Aminsus |
| Claudine Thevenet, Foundress of the Congregation of the Religious of Jesus and Mary |
| Claudius of Rome, Martyr |
| Claudius, Martyred at Leon, Spain |
| Clelia Barbieri, Foundress of the Little Sisters of the Mother of Sorrows |
| Clement I (of Rome), Pope, Martyr, and Father of the Church |
| Clement Mary Hofbauer, Redemptorist Priest, “Apostle of Vienna” |
| Clement of Alexandria, Head of the Catechetical School |
| Clement, Martyr |
| Clemente Vismara, Italian Priest, Missionary to Burma |
| Clementianus of Carthage, North African Martyr |
| Cleonicus of Pontus, Martyr |
| Cleopas, Disciple, Martyr |
| Cleta, Martyr |
| Cletus, Pope and Martyr |
| Clinus, Benedictine Abbot of Monte Cassino, Confessor |
| Clodulph, Bishop of Metz |
| Clotilde, Queen of the Franks, Wife of Clovis |
| Cloud (Clodoaldus), Abbot |
| Coelestinus, Martyr |
| Colette of Corbie, Reformer of the Poor Clares |
| Colman (Mocholmoc) Bishop of Dromore, Ireland |
| Colman of Eo, Abbot of Muckamore, Ireland |
| Colman, companion to St. Kilian, martyred in Würzburg |
| Coloman (Colman) Irish pilgrim martyred at Stockerau, Austria |
| Columba (Columcille), Abbot of Iona |
| Columba (Joseph) Marmion, Benedictine Abbot |
| Columba of Cordova, Nun, Martyr |
| Columba of Cornwall, Virgin and Martyr |
| Columbanus (Columban), Irish Missionary to Europe |
| Conan (Mochonna) Irish Missionary Bishop on the Isle of Man |
| Conatantius (one of several) |
| Concordius of Spoleto, Martyr |
| Conindrus, Priest baptized and ordained by St. Patrick, Missionary to the Isle of Man |
| Cono of Lucania, Benedictine Monk |
| Conon of Naso, Sicily, Basilian Monk |
| Conon of Pamphylia, Gardener and Martyr |
| Conrad |
| Conrad Birndorfer of Parzham, Capuchin Priest |
| Conrad of Piacenza, Confessor |
| Conrad, Bishop of Constance |
| Consortia of Lyon, Ascetic |
| Constabilis, 4th Abbot of Cava |
| Constance (Constantia Augusta, Costanza), daughter of Emperor Constantine I |
| Constance of Vercelli, Virgin |
| Constantine II, King of Scotland, Martyr |
| Constantine the Great, Emperor |
| Constantine, Bishop of Gap |
| Constantinus |
| Constantius, Bishop of Perugia |
| Contardo d’Este, pilgrim |
| Contardo Ferrini, Confessor |
| Corbinian (Waldegiso), First Abbot and Bishop of Freising |
| Cordula, Virgin and Martyr |
| Corentin, first Bishop of Quimper, Brittany |
| Cornelia, Martyr |
| Cornelia, Martyred in Africa |
| Cornelius the Centurion |
| Cornelius, Pope and Martyr |
| Cosmas, Syrian Physician and Martyr |
| Cosmos, Martyred near Jerusalem |
| Cosranzo (Constantius) of Fabriano, Dominican |
| Crato, Martyr |
| Crescentia Hoss, nun of the Third Order of St. Francis |
| Crescentia, Governess of St. Vitus, Martyr |
| Crescentiana of Rome, Martyr |
| Crescentius of Myra, Martyr |
| Crescentius, Martyr |
| Crestus of Tomis, Martyr |
| Crispin of Soissons, Martyr |
| Crispin of Viterbo, Capuchin Lay Brother |
| Crispinian of Soissons, Shoemaker, Martyr |
| Cristobal Magallanes Jara, Priest, Cristero Martyr |
| Cucufas, Martyr |
| Cunegunda, Empress |
| Cunibert, 9th Bishop of Cologne |
| Cuthbert Mayne, English Priest, Martyr |
| Cuthbert, Bishop of Lindisfarne |
| Cyaiaca of Rome, Martyr |
| Cyprian, Bishop of Carthage, Martyr, and Father of the Church |
| Cyprian, Bishop of Pisidian Antioch, Martyr |
| Cyriaca (Dominica), Virgin martyred at Nicomedia |
| Cyriacus of Attala in Pamphylia, boy Martyr |
| Cyriacus of Buonvicino, Basilian Monk, Martyr |
| Cyriacus of Rome, Deacon and Martyr |
| Cyriacus, Bishop of Ancona and Martyr |
| Cyril Bedizersky (of Belozero?), Russian monk |
| Cyril of Heliopolis (Baalbek), Deacon, Martyr |
| Cyril of Thessalonika, Martyr |
| Cyril, Bishop of Turov |
| Cyril, Deacon of Hierapolis and Martyr |
| Cyril, Martyr |
| Cyril, Monk, Missionary to Moravia, Developer of the Cyrillic Alphabet |
| Cyril, Patriarch of Alexandria and Father of the Church |
| Cyril, Patriarch of Jerusalem and Father of the Church |
| Cyrus of Egypt, Martyr |
| Czeslaw (Ceslas) Odrowaz, Dominican Priest, Brother of St. Hyacinth |
