| CYDNEY f English (Modern) |
| DEION m African American (Modern) |
| DEN m English |
| DÉNES m Hungarian |
| DENICE f English |
| DENIECE f English (Rare) |
| DENIS m French, Russian, English, German, Czech, Slovak, Slovene, Romanian, Croatian |
| DENISA f Czech, Slovak, Romanian |
| DENISE f French, English, Dutch |
| DENNIS m English, German, Dutch |
| DENNY m English |
| DENYS m Ukrainian |
| DEON m English, African American |
| DEONNE f English (Rare) |
| DEONTE m African American (Modern) |
| DINIS m Portuguese |
| DINIZ m Portuguese |
| DION m Ancient Greek, English |
| DIONE (2) f English |
| DIONISIA f Medieval English |
| DIONISIE m Romanian |
| DIONÍSIO m Portuguese |
| DIONISIO m Spanish, Italian |
| DIONNE f English |
| DIONYSIA f Late Roman |
| DIONYSIOS m Greek, Ancient Greek |
| DIONYSIUS m Ancient Greek (Latinized), Biblical |
| DIONYSODOROS m Ancient Greek |
| DIONYSOS m Greek Mythology |
| DIONYSUS m Greek Mythology (Latinized) |
| DIONÝZ m Slovak |
| DIOT f Medieval English |
| DWIGHT m English |
| DYE f Medieval English |
| DYSON m English (Rare) |
| SID m English |
| SIDNEY m & f English |
| SYD m English |
| SYDNE f English (Rare) |
| SYDNEY f & m English |
| SYDNIE f English (Modern) |
| TENNEY m Medieval English |
| TENNYSON m English (Rare) |
| TY m English |
| TYSON m English |
