Kammala wannan jumla: Ofishin "amir al-ʿarab" ya wuce ga ɗan Muhanna Sharaf ad-Din ʿIsa, kodayake ba a bayyana wane Mamluk sultan ya ba shi taken ba. Dangane da wasu kafofin zamanin Mamluk, Sultan Qutuz (r. 1259<unk>1260) ya nada ʿIsa bayan nasarar Mamluk a kan Mongols a
Yaƙin Ayn Jalut. Koyaya masanin tarihin Larabawa na ƙarni na 14 al-ʿUmari ya yi iƙirarin magajin Qutuz Baybars ya mai da ʿIsa "amir al-ʿarab". Wannan a bayyane ya kasance lada ne ga taimakon Isa da abokantaka yayin gudun hijirar Baybars a Siriya a cikin 1250s a lokacin da mahaifin Abu Bakr Ali ya hana shi mafaka. Duk abin da ya dace, Baybars aƙalla ya tabbatar da nadin ʿIsa da "iqtaʿat" (fiefs) a cikin 1260/61. Dan uwan Abu Bakr Zamil da dan Tahir ibn Ghannam Ahmad duk sun kalubalanci nadin Isa. Na biyun ya nemi rabo a cikin masarautar, amma Baybars ya ba shi karamar masarauta a wani wuri a Siriya a maimakon haka, yayin da Zamil ya yi tawaye don samun cikakken iko da masarautar ʿIsa. ʿIsa da Mamluks sun kayar da Zamil kuma an daure shi a Alkahira. Daga baya an sake shi kuma an sami zaman lafiya na ɗan lokaci tsakanin shi, ʿIsa da sauran sarakunan Banu Rabi'ah. 'Ya fi ƙarfin adawa da Isa ya fito ne daga danginsa a Al Mira a ƙarƙashin jagorancin Ahmad ibn Hajji, wanda ya mamaye kabilun kudancin Siriya. A hankali, ƙiyayya tsakanin Al Fadl da Al Mira ta ɓace yayin da aka ba Ahmad 'yancin kai a cikin kudancin hamada, yayin da ʿIsa ya kasance "amir al-ʿarab".