ABULABBOS Mamun ibni Mamuni Khorazmshoh (soli tavallud nomalum – 1017 Gurganj), seyumin farmonfarmoi Khorazm az khonadoni Mamuniyon. Bad az vafoti barodarash ba takhti saltanat nishast. Abulabbos siyosati sozishkoronae bo Gaznaro pesh girift va irtibotash bo sultoni Gazna mustahkamtar shud. Abulabbos dar natijai isyoni guruhhoi ziddi Mahmudi Gaznavi, ki az siyosati Abulabbos norizo budand, kushta shud.
Bad az margi Abulabbos shurishiyon barodarzodai Abulabbos Abulhoris Muhammad ibni Aliro ba takht nishondand. Ba in tartib hukmronii siyosii khonadonhoi mahalli az Khorazm baraftod.