| Gervasio | | jer-VAH-zyo (Italian), her-BAH-syo (Spanish) | Italian, Spanish | |
| Gil (1) | | HEEL (Spanish), ZHEEL (Portuguese) | Spanish, Portuguese | |
| Gilberto | | jeel-BER-to (Italian), heel-BER-to (Spanish) | Italian, Spanish, Portuguese | |
| Gisela | | - | German, Dutch, Spanish, 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 | |
| Godofredo | | go-dho-FRE-do (Spanish) | Spanish, Portuguese | |
| Gonzalo | | gon-THAH-lo (Spanish), gon-SAH-lo (Latin American Spanish) | Spanish | |
| Goyo | | GO-yo | Spanish | |
| Gracia | | GRAH-thyah (Spanish), GRAH-syah (Latin American Spanish) | Spanish | |
| 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 | |
| Graciela | | grah-THYE-lah (Spanish), grah-SYE-lah (Latin American Spanish) | Spanish | |
| Gregorio | | gre-GO-ryo | Italian, Spanish | |
| Griselda | | gri-ZEL-də (English) | English, Scottish, Spanish, Literature | |