'Abd al-Haqq al-DehlawiA. C. EwingA. D. GordonA. J. AyerA Satyanarayana ShastriAaron Ben-Ze'evAbas (sophist)Abd-Allah ibn NumayrAbd-al-Baqi al-ZurqaniAbd al-Hamid al-KatibAbd al-Hussein al-HilliAbd al-Rahman al-KawakibiAbdel Rahman BadawiAbdolkarim SoroushAbdul Haq AnsariAbdulhakim ArvasiAbdullah Quraishi Al-AzhariAbha SaxenaAboutorab NaficyAbroteliaAbu-Abdullah AdelabuAbu Abd al-Rahman Ibn Aqil al-ZahiriAbu Bakr Ibn Sayyid al-NāsAbu Hatim Ahmad ibn Hamdan al-RaziAbu Hilal al-AskariAbu Ishaq al-Tha'labiAbu Muslim al-KhawlaniAbu Zayd al-BalkhiAbu al-Hasan al-ShushtariAbu ali FarmadiAbulfedaAchille MbembeAchille Varzi (philosopher)Adam FergusonAdam Karl August von EschenmayerAdam SchaffAdam WatsonAdam WeishauptAdam of DryburghAdamantios Korais