| Tatiana | | tah-TYAH-nah (Russian, Polish, Spanish, Italian), TAH-tee-ah-nah (Finnish), ta-tee-AN-ə (English), ta-TYAN-ə (English) | Russian, Slovak, Bulgarian, Romanian, Polish, Greek, Georgian, Spanish, Portuguese, Italian, Finnish | |
| Tatjana | | TAHT-yah-nah (Finnish) | Serbian, Croatian, Slovene, Macedonian, German, Latvian, Lithuanian, Finnish | |
| Tatu | | TAH-too | Finnish | |
| Tauno | | TOW-no | Finnish | |
| Tea | | TE-ah (Finnish) | Croatian, Slovene, Swedish, Danish, Norwegian, Finnish | |
| Teemu | | TE:-moo | Finnish | |
| Teija | | TAY-yah | Finnish | |
| Tellervo | | - | Finnish Mythology | |
| Teppo | | TEP-po | Finnish | |
| 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 | |
| Terhi | | TER-hee | Finnish | |
| Terho | | TER-ho | Finnish | |
| Tero | | TE-ro | Finnish | |
| Terttu | | TERT-too | Finnish | |
| Teuvo | | TE-oo-vo | Finnish | |