| Achaikos | | - | Biblical Greek, Ancient Greek | |
| Achard | | - | Old Norman | |
| Achieng | | - | Eastern African, Luo | |
| Achille | | a-SHEEL (French), ah-KEEL-le (Italian) | French, Italian | |
| Achim (1) | | AH-khim | German | |
| Aco | | - | Macedonian, Serbian | |
| AdÁN | | ah-DHAHN | Spanish | |
| AdÉL | | AH-dayl | Hungarian | |
| Ada | | AY-də (English), AH-dah (Polish, Finnish) | English, German, Polish, Hungarian, Italian, Finnish | |
| Adaeze | | - | Western African, Igbo | |
| Adalberht | | - | Ancient Germanic | |
| Adalbern | | - | Ancient Germanic | |
| Adalbert | | AH-dahl-bert (German) | Ancient Germanic, German, Polish | |
| Adalberto | | ah-dahl-BER-to (Italian, Spanish), ə-dəl-BER-too (Portuguese) | Italian, Spanish, Portuguese | |
| Adalfarus | | - | Ancient Germanic (Latinized) | |