The Catholic Church confers the rank of ‘doctor’ on saints whose writings have played an important role in our faith. Along the way, many of those doctors have acquired a title (a theological nickname, perhaps).
I gathered together as many of those titles as I could, and put them in a table. This table is not authoritative; it is simply a collection of descriptors commonly used to show esteem and affection for these great saints.
Table
| Doctor | Title |
|---|---|
| St. Jerome, 345-420 | Father of Biblical Science |
| St. Augustine, 354-430 | Doctor Gratiae |
| St. Gregory the Great, 540-604 | Father of Christian Worship |
| St. Athanasius, 295-373 | Father of Orthodoxy |
| St. Basil the Great, 330-379 | Father of Monasticism in the East |
| St. Gregory of Nazianzus, 330-390 | The Christian Demosthenes |
| St. John Chrysostom, 345-407 | Golden-Mouthed |
| St. Ephraem the Deacon, 306-373 | Harp of the Holy Spirit |
| St. Hilary, 315-368 | The Athanasius of the West, Hammer of the Arians |
| St. Cyril of Alexandria, 376-444 | Doctor Incarnationis |
| St. Leo the Great, 390-461 | Doctor of Church Unity |
| St. Peter Chrysologus, 400-450 | Golden-Worded |
| St. Isidore of Seville, 560-636 | The Last Scholar of the Ancient World |
| St. John Damascene, 676-749 | Golden Speaker |
| St. Bede the Venerable, 673-735 | Father of English History |
| St. Anselm, 1033-1109 | Doctor Magnificus, Doctor Marianus, Founder of Scholasticism |
| St. Bernard of Clairvaux, 1090-1153 | Doctor Mellifluus |
| St. Hildegard of Bingen, 1098-1179 | Sybil of the Rhine |
| St. Anthony of Padua, 1195-1231 | Doctor Evangelicus |
| St. Albert the Great, 1200-1280 | Doctor Universalis, Doctor Expertus |
| St. Bonaventure, 1217-1274 | Doctor Seraphicus |
| St. Thomas Aquinas, 1225-1274 | Doctor Angelicus |
| St. Catherine of Siena, 1347-1379 | Co-patroness of Europe |
| St. John of Avila 1499-1569 | Apostle of Andalusia |
| St. Peter Canisius, 1521-1597 | Second Apostle of Germany |
| St. John of the Cross, 1542-1591 | Doctor Mysticus |
| St. Lawrence of Brindisi, 1559-1619 | Doctor Apostolicus |
| St. Francis de Sales, 1567-1622 | Doctor Caritatis |
| St. Alphonsus Liguori, 1696-1787 | Doctor Zelantissimus |
| St. Therese of Lisieux, 1873-1897 | Co-patroness of Missionaries |
Doctors without titles
| Doctor |
|---|
| St. Cyril of Jerusalem, 315-387 |
| St. Ambrose of Milan, 340-397 |
| St. Gregory of Narek, c. 945-1010 |
| St. Peter Damian, 1007-1072 |
| St. Teresa of Avila, 1515-1582 |
| St. Robert Bellarmine, 1542-1621 |