| Teresa | | te-RE-sah (Spanish, Polish), te-RE-zah (Italian, German), TE-re-sah (Finnish), tə-REE-sə (English), tə-REE-zə (English) | Spanish, Portuguese, Italian, Finnish, Polish, German, Swedish, Norwegian, Danish, English | |
| Teresinha | | - | Portuguese | |
| Tereza | | te-REZ-ah (Romanian) | Czech, Portuguese (Brazilian), Bulgarian, Romanian | |
| Terezinha | | - | Portuguese (Brazilian) | |
| ThaÍS | | - | Portuguese (Brazilian) | |
| Thalita | | - | Portuguese (Brazilian) | |
| Thiago | | - | Portuguese (Brazilian) | |
| Tiago | | - | Portuguese | |
| Tiburcio | | - | Spanish, Portuguese | |
| Timoteo | | tee-mo-TE-o (Italian, Spanish) | Italian, Spanish, Portuguese | |
| Tito | | TEE-to (Italian, Spanish) | Italian, Spanish, Portuguese | |
| TomÁS | | to-MAHS (Spanish), too-MASH (Portuguese) | Spanish, Portuguese, Irish | |
| TomÉ | | - | Portuguese | |
| Toninho | | - | Portuguese | |
| TristÃO | | - | Portuguese | |