| DEE f & m English |
| DITTE f Danish |
| DODIE f English |
| DOLLIE f English |
| DOLLY f English |
| DÓRA f Hungarian |
| DORA f Croatian, Dutch, English, Greek, Serbian, Spanish |
| DOREAN f English |
| DOREEN f English |
| DORETE f Danish |
| DORETTA f English |
| DORIA f English (Rare) |
| DORIKA f Hungarian |
| DORIN m Romanian |
| DORINA (1) f Romanian |
| DORINA (2) f Hungarian |
| DORINDA f English |
| DORINE f English |
| DORIT (2) f Danish |
| DORITA f English (Rare), Spanish |
| DOROFEI m Russian |
| DOROFEY m Russian |
| DOROTA f Czech, Polish, Slovak |
| DOROTEA f Croatian, Finnish, Italian, Spanish, Swedish |
| DOROTÉIA f Portuguese (Brazilian) |
| DOROTEIA f Portuguese |
| DOROTĖJA f Lithuanian |
| DOROTEJA f Croatian, Macedonian, Serbian, Slovene |
| DOROTHEA f Danish, Dutch, English, German, Late Greek, Norwegian |
| DOROTHÉE f French |
| DOROTHEOS m Greek, Late Greek |
| DOROTHEUS m Late Roman |
| DOROTHY f English |
| DOROTTYA f Hungarian |
| DORTE f Danish |
| DORTHA f English |
| DÖRTHE f Low German |
| DORTHE f Danish |
| DORTHY f English |
| DORY f English |
| DOSIA f Polish |
| DOT f English |
| DOTTIE f English |
| DOTTY f English |
| EA (2) f Danish, Norwegian, Swedish |
| FEDIR m Ukrainian |
| FEDOR m Russian |
| FEDORA f Russian |
| FEDYA m Russian |
| FEODOR m Russian |
| FEODORA f Russian |
| FYODOR m Russian |
| ISADOR m English (Rare) |
| ISADORA f English |
| ISADORE m English |
| ISIDOR m German, Macedonian, Russian |
| ISIDORA f English (Rare), Ancient Greek, Italian (Rare), Macedonian, Portuguese, Russian (Rare), Spanish |
| ISIDORE m English, French, Georgian, Jewish |
| ISIDORO m Italian, Spanish |
| ISIDOROS m Ancient Greek |
| ISIDORUS m Late Roman |
| ISIDRO m Spanish |
| ISIS f Egyptian Mythology (Hellenized) |
| ISSY m English |
| IZIDOR m Slovene |
| IZIDÓRA f Hungarian |
| IZYDOR m Polish |
| IZZY m English |
| TEA f Croatian, Danish, Finnish, Norwegian, Slovene, Swedish |
| TED m English |
| TEDDY m English |
| TEDORE m Georgian |
| TEIJA f Finnish |
| TEJA f Slovene |
| TÉO m Portuguese |
| TEO m Croatian, Italian, Spanish |
| TEODOR m Bulgarian, Croatian, Czech, Danish, Hungarian, Macedonian, Norwegian, Polish, Romanian, Serbian, Slovak, Slovene, Swedish |
| TEODÓRA f Hungarian |
| TEODORA f Bulgarian, Italian, Macedonian, Polish, Portuguese, Romanian, Swedish |
| TEODORO m Italian, Portuguese, Spanish |
| TEODORS m Latvian |
| TEUVO m Finnish |
| TEWODROS m Amharic |
| THEA f Danish, English, German, Norwegian, Swedish |
| THEDA f German |
| THEI m Limburgish |
| THEIRN m French |
| THÉO m French |
| THEO m Dutch, English |
| THEODOOR m Dutch |
| THEODOR m Czech, Danish, German, Norwegian, Romanian, Swedish |
| THEODORA f English, Greek, Ancient Greek |
| THÉODORE m French |
| THEODORE m English |
| THEODOROS m Greek, Ancient Greek |
| THEODORUS m Dutch, Ancient Greek (Latinized) |
| TIIA f Finnish |
| TIVADAR m Hungarian |
| TÓDOR m Hungarian |
| TODOR m Bulgarian, Macedonian, Serbian |
| TODORKA f Bulgarian, Macedonian |
| TOŠE m Macedonian |
| TOSHE m Macedonian |
| TUDOR (2) m Romanian |
| URTĖ f Lithuanian |
