| 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 | |
| Teodora | | te-o-DAW-rah (Italian), te-o-DHO-rah (Spanish), te-aw-DAW-rah (Polish) | Italian, Spanish, Portuguese, Swedish, Romanian, Polish, Bulgarian, Macedonian, Serbian | |
| Tereza | | te-REZ-ah (Romanian) | Czech, Portuguese (Brazilian), Bulgarian, Romanian | |
| Tihomir | | - | Croatian, Bulgarian, Serbian, Macedonian | |
| Timotei | | - | Bulgarian, Romanian | |
| Todor | | - | Bulgarian, Serbian, Macedonian | |
| Todorka | | - | Bulgarian, Macedonian | |
| Toma (2) | | TO-mah (Croatian, Serbian) | Romanian, Croatian, Serbian, Bulgarian, Macedonian, Georgian | |
| Trifon | | - | Bulgarian | |
| Tsveta | | - | Bulgarian | |
| Tsvetan | | - | Bulgarian | |
| Tsvetanka | | - | Bulgarian | |
| Tsvetko | | - | Bulgarian | |
| Valentin | | VAH-len-teen (German), vah-lyen-TEEN (Russian), vah-leen-TEEN (Russian) | French, Romanian, German, Danish, Swedish, Norwegian, Czech, Russian, Bulgarian, Slovene, Croatian, | |
| Valeri | | vah-LYE-ree (Russian) | Bulgarian, Georgian, Russian | |