| Gisela | | - | German, Dutch, Spanish, Portuguese | |
| GlÁUcia | | - | Portuguese | |
| GlÁUcio | | - | Portuguese | |
| Glauco | | GLOW-ko (Italian, Spanish) | Italian, Spanish, Portuguese | |
| Gloria | | GLAWR-ee-ə (English), glo-REE-ah (Italian), GLAW-ryah (Polish) | English, Italian, Spanish, Portuguese, German, Polish | |
| Glorinda | | glo-REEN-dah | Esperanto | |
| Godofredo | | go-dho-FRE-do (Spanish) | Spanish, Portuguese | |
| GonÇAlo | | goon-SA-loo | Portuguese | |
| Goro | | go-ṙo: | Japanese | |
| Gorou | | go-ṙo: | Japanese | |
| GraÇA | | GRA-sə | Portuguese | |
| GracÍLia | | grə-SEEL-yə | Portuguese | |
| Graciana | | grah-THYAH-nah (Spanish), grah-SYAH-nah (Latin American Spanish), grə-SYA-nə (Portuguese) | Spanish, Portuguese | |
| Graciano | | grah-THYAH-no (Spanish), grah-SYAH-no (Latin American Spanish), grə-SYA-noo (Portuguese) | Spanish, Portuguese | |
| GuÁLter | | - | Portuguese | |