| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 621 | Tedmund | Teutonic | Defender of the nation. | M | |
| 622 | Terrell | Teutonic | Martial ruler. | M | |
| 623 | TerriIl | Teutonic | Martial ruler. | M | |
| 624 | Terris | Teutonic | Son of Terry. | M | |
| 625 | Terriss | Teutonic | Son of Terry. | M | |
| 626 | Terry | Teutonic | People's rule. | M | |
| 627 | Thayer | Teutonic | Nation's army. | M | |
| 628 | Theobald | Teutonic | People's prince. | M | |
| 629 | Theodoric | Teutonic | People's rule. | M | |
| 630 | Theodric | Teutonic | People's rule. | M | |
| 631 | Theodrik | Teutonic | People's rule. | M | |
| 632 | Theomund | Teutonic | Defender of the nation. | M | |
| 633 | Thierry | Teutonic | People's rule. | M | |
| 634 | Thilo | Teutonic | People's rule. | M | |
| 635 | Thorbert | Teutonic | Glorious as Thor. | M | |
| 636 | Thorley | Teutonic | From Thor's meadow. | M | |
| 637 | Thorpe | Teutonic | From the hamlet. | M | |
| 638 | Thorsten | Teutonic | Thor's stone. | M | |
| 639 | Thurston | Teutonic | Thor's stone. | M | |
| 640 | Til | Teutonic | People's rule. | M | |