| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 501 | Terrence | Norse | Variant of Terence: Like Thor (Thor was the head of the Norse pantheon and god of thunder). | M | |
| 502 | Terry | Norse | Diminutive of Terence: Like Thor (Thor was the head of the Norse pantheon and god of thunder). | M | |
| 503 | Thangbrand | Norse | A missionary. | M | |
| 504 | ThDrbjorn | Norse | Bear of Thor. | M | |
| 505 | Thialfi | Norse | A mythical servant of Thor. | M | |
| 506 | Thjalfi | Norse | A mythical servant of Thor. | M | |
| 507 | Thor | Norse | God of thunder. | M | |
| 508 | Thorald | Norse | Thor ruler. | M | |
| 509 | Thorarin | Norse | Son of Thorkol. | M | |
| 510 | Thorbert | Norse | The glorious Thor. | M | |
| 511 | Thorbiartl | Norse | The glorious Thor. | M | |
| 512 | Thorbum | Norse | Bear of Thor. | M | |
| 513 | Thord | Norse | Son of Viking. | M | |
| 514 | Thorfinn | Norse | Thunder Finn. | M | |
| 515 | Thorgils | Norse | Father of Ingiald. | M | |
| 516 | Thorgrim | Norse | Brother of Onund Bild. | M | |
| 517 | Thorhadd | Norse | Son of Stein. | M | |
| 518 | Thorir | Norse | Son of Asa. | M | |
| 519 | Thorkel | Norse | A sorcerer. | M | |
| 520 | Thorlak | Norse | Bishop of Skalholt. | M | |