| Nom complet | Nom | Commentaire | Pays | Spécimens |
|---|---|---|---|---|
| Abdallahi | Abdallahi | Guinée | Mauritanie | 2 |
| J. Abety | Abety | 7 | ||
| Abonando | Abonando | 1 | ||
| Aboua | Aboua | 1 | ||
| Aboubakar | Aboubakar | Cameroun | 2 | |
| F. Achenbach | Achenbach | Allemagne | 1 | |
| Achlen | Achlen | Belgique | 1 | |
| Gaston Achoundong | Achoundong | Cameroun | 178 | |
| Adama | Adama | Cameroun | 1 | |
| Jacques-Georges Adam | Adam J.-G. | France | 7 | |
| Charles Dennis Adams | Adams C.D. | Angleterre | 2 | |
| Haman Adji | Adji | Cameroun | 50 | |
| Agiy | Agiy | 1 | ||
| Agly | Agly | 1 | ||
| Laurent Aké Assi | Aké Assi L. | 1931-2014 | Côte d'Ivoire | 6 |
| Akogo | Akogo | 5 | ||
| Akuo | Akuo | 1 | ||
| Fidèle Alladoum | Alladoum | Cameroun | 1 | |
| Jean-Louis Amiet | Amiet | France | 3 | |
| Amombo | Amombo | 1 |