near 'ajjur, at "khirbet jannaba al-fauqa", was a probable site of the battle of ajnadayn, waged in the 7th-century ce between the rashidun caliphate and the byzantine empire, and which resulted in a decisive rashidun victory, incorporating most of palestine into the domains of islam. the village of 'ajjur itself was built during early fatimid rule in the region in the early twelfth century ce. a mosque was built during this period, and continued to serve 'ajjur's community until its demise. the village 'ajjur is believed to be named after "a sort of cucumber."