| Thiemo | | - | German, Dutch, Ancient Germanic | |
| Thijmen | | - | Dutch | |
| Thijs | | TIES | Dutch | |
| Thirza | | TIRH-zah | Dutch | |
| Thomas | | TAHM-əs (English), TOM-əs (English), to-MAH (French), TO-mahs (German, Dutch), tho-MAHS (Greek) | English, French, German, Dutch, Swedish, Norwegian, Danish, Greek, Biblical, Biblical Latin, Biblica | |
| Thyrza | | - | Dutch | |
| Tiede | | TEE-də (Dutch) | Frisian, Dutch | |
| Ties | | - | Dutch | |
| Tijmen | | - | Dutch | |
| Tijn | | - | Dutch | |
| Til | | TIL | Dutch, Limburgish | |
| Tim | | TIM (English, German, Dutch, Slovene) | English, German, Dutch, Slovene, Swedish, Norwegian, Danish | |
| Timo (1) | | TEE-mo | Finnish, German, Dutch | |
| Timo (2) | | TEE-mo | German, Dutch | |
| Timon | | TIE-mən (English), TEE-mawn (Dutch) | Ancient Greek, Biblical, Biblical Greek, Biblical Latin, Dutch | |