Ibn al-Dahhak (d. 927, fortress of al-Ja'fari) was a Kurdish chieftain, who abandoned Islam, converted to Christianity and entered the service of the Byzantine emperor Romanos I Lekapenos (r. 920–944).
Romanos gave him rich gifts and sent him back to his base, the fortress of al-Ja'fari, located probably in the vicinity of Tarsus.
In late autumn 927, however, he was attacked, defeated and killed by the Abbasid governor of Tarsus, Thamal al-Dulafi.
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