Abubakar Atiku Rabah Ibn Muhammad Bello (An haife shi a 1873 – 1877). a Wurno, da ne ga Muhammadu Bello kuma jika ga Shehu Usman Danfodio. Abubakar Atiku na rabah shine Kalifa na takwas (8) a cikin jerin kalifofin Sokoto. Ya samu sunan na Rabah ne don shine Mai Garin Rabah kafin zamanshi Kalifa. Yayi karatu mai yawa kuma yana da halaye mai kyau, an yabe shi da gaskiya, adalci da kuma doriya akan ayyukan magabatansa. Ya fara karatunshi a gida, mafi yawancin malamanshi jinin shine, ma’ana danginshi. Wa inda suke karkashin mahaifinsa da kuma yan’uwan masu kusanci. Yayi karatun sane a cikin Sokoto da Wurno bayan kammala kananun karatu sai ya fara iya karanta bayan nan kuma aka dogar dashi wajen haddace Al-Qur’ani Mai Girma. Inda daganan ya wuce ya fara su, Fighu, Tauhid and Hadith. Bayan rasuwar Kalifa Ahmed Rufa’i dan yayanshi Abubakar Ibn Muhammad Bello ya zama sarki a ranar Asabar da safiya mayu (March) 18, 1873. Ya kasance mai girma saboda gaskiyarsa. Har bayan sarautar sa ya kasance yana noma kuma yana ciyar da ahalinsa da guminsa.