| Aracely | | - | Spanish | |
| Arcelia | | - | Spanish | |
| Ariadna | | ah-RYAHD-nah (Spanish, Polish) | Spanish, Catalan, Russian, Polish | |
| Aristides | | ah-ree-STEE-dhes (Spanish), ə-reesh-TEE-dəsh (Portuguese), ə-reesh-CHEE-jəsh (Brazilian Portuguese) | Ancient Greek (Latinized), Spanish, Portuguese | |
| Armando | | ahr-MAHN-do (Spanish, Italian) | Spanish, Italian, Portuguese | |
| Armida | | - | Italian, Spanish | |
| Arsenio | | ahr-SE-nyo (Spanish, Italian) | Spanish, Portuguese, Italian | |
| Artemio | | - | Italian, Spanish | |
| Arturo | | ahr-TOO-ro | Italian, Spanish | |
| AscensiÓN | | ah-then-SYON (Spanish), ah-sen-SYON (Latin American Spanish) | Spanish | |
| Asdrubal | | - | Spanish | |
| Asun | | AH-soon | Spanish | |
| AsunciÓN | | ah-soon-THYON (Spanish), ah-soon-SYON (Latin American Spanish) | Spanish | |
| Atilio | | ah-TEEL-yo | Spanish | |
| Augusto | | ow-GOOS-to (Spanish) | Spanish, Italian, Portuguese | |