| Titus 1:2 | 1 Clement 27.2 · Clement of Rome | echo, medium confidence | ca. 95–97 (range ca. 70–100) |
| Titus 1:2 | Martyrdom of Polycarp 14.2 · Anonymous | echo, low confidence | ca. 156–160 |
| Titus 1:2 | Miscellanies 6.9.77 · Clement of Alexandria | allusion, high confidence | ca. 198–203 |
| Titus 1:5 | The Instructor 3.12.97 · Clement of Alexandria | allusion, medium confidence | ca. 190–200 |
| Titus 1:6 | Miscellanies 3.12.90 · Clement of Alexandria | allusion, medium confidence | ca. 198–203 |
| Titus 1:6 | Refutation of All Heresies 9.12.22 · Hippolytus of Rome | allusion, medium confidence | ca. 222–235 |
| Titus 1:9 | Against Celsus 3.48 · Origen | quotation, high confidence | ca. 248 |
| Titus 1:9 | Against Celsus 6.7 · Origen | quotation, high confidence | ca. 248 |
| Titus 1:10 | Miscellanies 1.8.41 · Clement of Alexandria | quotation, high confidence | ca. 198–203 |
| Titus 1:10 | Against Celsus 3.48 · Origen | allusion, high confidence | ca. 248 |
| Titus 1:11 | Against Celsus 3.48 · Origen | allusion, medium confidence | ca. 248 |
| Titus 1:12 | Oration to the Greeks 27 · Tatian | echo, medium confidence | ca. 165–172 |
| Titus 1:12 | A Plea for the Christians 30 · Athenagoras | echo, medium confidence | ca. 176–180 |
| Titus 1:12 | Miscellanies 1.14.59 · Clement of Alexandria | quotation, high confidence | ca. 198–203 |
| Titus 1:13 | Miscellanies 1.14.59 · Clement of Alexandria | quotation, high confidence | ca. 198–203 |
| Titus 1:13 | Against Celsus 5.1 · Origen | allusion, high confidence | ca. 248 |
| Titus 1:14 | To the Magnesians 8.1 · Ignatius of Antioch | echo, medium confidence | ca. 110 (range ca. 105–135) |
| Titus 1:14 | Against Celsus 2.52 · Origen | echo, medium confidence | ca. 248 |
| Titus 1:15 | Miscellanies 3.18.109 · Clement of Alexandria | quotation, high confidence | ca. 198–203 |
| Titus 1:16 | Miscellanies 4.9.74 · Clement of Alexandria | quotation, high confidence | ca. 198–203 |
| Titus 2:3 | Miscellanies 4.20.128 · Clement of Alexandria | quotation, high confidence | ca. 198–203 |
| Titus 2:4–5 | To the Philippians 4.2 · Polycarp of Smyrna | echo, low confidence | ca. 110–135 |
| Titus 2:4 | Miscellanies 4.20.128 · Clement of Alexandria | quotation, high confidence | ca. 198–203 |
| Titus 2:5 | Miscellanies 2.23.146 · Clement of Alexandria | allusion, medium confidence | ca. 198–203 |
| Titus 2:5 | Miscellanies 4.20.128 · Clement of Alexandria | quotation, high confidence | ca. 198–203 |
| Titus 2:11 | Exhortation to the Greeks 1.7 · Clement of Alexandria | quotation, high confidence | ca. 190–200 |
| Titus 2:12 | Exhortation to the Greeks 1.7 · Clement of Alexandria | quotation, high confidence | ca. 190–200 |
| Titus 2:12 | Miscellanies 7.12.74 · Clement of Alexandria | quotation, medium confidence | ca. 198–203 |
| Titus 2:13 | Exhortation to the Greeks 1.7 · Clement of Alexandria | quotation, high confidence | ca. 190–200 |
| Titus 2:14 | 1 Clement 64.1 · Clement of Rome | echo, medium confidence | ca. 95–97 (range ca. 70–100) |
| Titus 2:14 | Epistle of Barnabas 14.6 · Anonymous | echo, medium confidence | ca. 70–135 (often ca. 130) |
| Titus 2:14 | Miscellanies 1.18.89 · Clement of Alexandria | quotation, high confidence | ca. 198–203 |
| Titus 2:14 | Miscellanies 6.13.106 · Clement of Alexandria | allusion, high confidence | ca. 198–203 |
| Titus 2:14 | Miscellanies 6.17.159 · Clement of Alexandria | allusion, high confidence | ca. 198–203 |
| Titus 2:14 | On Prayer 27.7 · Origen | echo, low confidence | ca. 233–234 |
| Titus 3:1 | 1 Clement 2.7 · Clement of Rome | quotation, medium confidence | ca. 95–97 (range ca. 70–100) |
| Titus 3:1 | 1 Clement 33.1 · Clement of Rome | allusion, medium confidence | ca. 95–97 (range ca. 70–100) |
| Titus 3:1 | 1 Clement 34.4 · Clement of Rome | echo, medium confidence | ca. 95–97 (range ca. 70–100) |
| Titus 3:1 | Martyrdom of Polycarp 10.2 · Anonymous | echo, low confidence | ca. 156–160 |
| Titus 3:1 | To Autolycus 3.14 · Theophilus of Antioch | allusion, high confidence | ca. 180–185 |
| Titus 3:1 | On Idolatry 15 · Tertullian | allusion, medium confidence | ca. 196–211 |
| Titus 3:3 | Exhortation to the Greeks 1.4 · Clement of Alexandria | quotation, high confidence | ca. 190–200 |
| Titus 3:3–6 | Against Celsus 1.64 · Origen | quotation, high confidence | ca. 248 |
| Titus 3:4 | To Diognetus 9.2 · Anonymous | echo, medium confidence | ca. 150–200 (disputed) |
| Titus 3:4 | Dialogue with Trypho 47.5 · Justin Martyr | echo, medium confidence | ca. 155–160 |
| Titus 3:4 | Exhortation to the Greeks 1.4 · Clement of Alexandria | quotation, high confidence | ca. 190–200 |
| Titus 3:5 | 1 Clement 32.4 · Clement of Rome | echo, medium confidence | ca. 95–97 (range ca. 70–100) |
| Titus 3:5 | To Autolycus 2.16 · Theophilus of Antioch | allusion, high confidence | ca. 180–185 |
| Titus 3:5 | The Instructor 1.5.21 · Clement of Alexandria | echo, medium confidence | ca. 190–200 |
| Titus 3:5 | The Instructor 1.6.26 · Clement of Alexandria | echo, medium confidence | ca. 190–200 |
| Titus 3:5 | Exhortation to the Greeks 1.4 · Clement of Alexandria | quotation, high confidence | ca. 190–200 |
| Titus 3:5 | Exhortation to the Greeks 9.88 · Clement of Alexandria | echo, medium confidence | ca. 190–200 |
| Titus 3:5 | Prophetic Extracts 5.2 · Clement of Alexandria | echo, high confidence | ca. 200 |
| Titus 3:5 | To Donatus 3 · Cyprian of Carthage | echo, medium confidence | ca. 246 |
| Titus 3:5 | On the Lapsed 24 · Cyprian of Carthage | echo, medium confidence | 251 |
| Titus 3:9 | Prescription against Heretics 7 · Tertullian | allusion, medium confidence | ca. 203 |
| Titus 3:9 | Against Marcion 1.9 · Tertullian | allusion, medium confidence | 207/208 (third edition, completed later) |
| Titus 3:10 | Prescription against Heretics 12 · Tertullian | allusion, low confidence | ca. 203 |
| Titus 3:10 | Prescription against Heretics 16 · Tertullian | allusion, high confidence | ca. 203 |
| Titus 3:10 | Prescription against Heretics 6 · Tertullian | quotation, high confidence | ca. 203 |
| Titus 3:10–11 | Against Celsus 5.63 · Origen | quotation, high confidence | ca. 248 |
| Titus 3:10–11 | On the Unity of the Catholic Church 17 · Cyprian of Carthage | allusion, high confidence | 251 |
| Titus 3:11 | Prescription against Heretics 6 · Tertullian | quotation, high confidence | ca. 203 |