Here are some Sunni scholars who talked about the birth of imam Mahdi (PBUH) and believe that he is the awaited Mahdi.
– (Alkandozi alhanafi) in Yanabee al mawada V:2 P:566.
– (Alkhawarizmi) in
Maktal al Khawarizmi P:144 hadith: 21.
– (Ibn al Jawzi) in Tathkirat al Khawas P:325.
– (Alkunji al Shafei) in
Kifayat al talib fi manakin Ali bin abi Talib P: 312.
– (Alkunji al Shafei) in
Albayan fi akhbar sahib alzaman P: 148.
– (Aljoweini a Sshafei) in
Faraed al Simtain P: 136.
-(Ibin sabaag al Maliki) in
Alfosol almuhima fi marifat Al aema P:282.