| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Dian | DEE-ahn | Indonesian | ||
| Diana | die-AN-ə (English), dee-AH-nah (Italian, German, Dutch) | English, Spanish, Italian, Portuguese, Romanian, Catalan, German, Dutch, Danish, Swedish, Norwegian, | ||
| Diane | dee-AHN (French), die-AN (English) | French, English | ||
| Diann | die-AN | English | ||
| Dianna | die-AN-ə | English | ||
| Dianne | dee-AHN (French), die-AN (English) | French, English | ||
| Diantha | - | Dutch, English (Rare) | ||
| Diarmad | - | Scottish | ||
| Diarmaid | DEER-mid | Irish, Irish Mythology | ||
| Diarmait | - | Irish, Irish Mythology | ||
| Diarmuid | - | Irish, Irish Mythology | ||
| Dick (1) | DIK | English | ||
| Dicun | - | Medieval English | ||
| Didacus | - | Medieval Spanish | ||
| Diego | DYE-go | Spanish |