Al-ÿAlÃÂþ ibn Mughëth (), called variously al-Yaḥṣubë, al-Ḥaá¸Âramë or al-JudhÃÂmë, was the ÿAbbÃÂsid-appointed governor of al-Andalus (Spain) in opposition to the Umayyads in <small>AD</small> 763 (<small>AH</small> 146).
The chronicles disagree about al-ÿAlÃÂþ ibn Mughëth's origins. The Fatḥ al-Andalus, Ibn al-Athër, al-Nuwayrë and al-Maḳḳarë claim that he was a native of Ifrëḳiya (Tunisia) sent to Spain by the ÿAbbÃÂsid caliph al-Maná¹£à «r (). On the other hand, the AkhbÃÂr majmà «Ã¿a, Ibn al-á¸²à «á¹Âiyya and Ibn ÿIdhÃÂrë claim that he was from Beja in southwestern al-Andalus, where he held the local office of riyÃÂsa (political and military headship). The historian Roger Collins inclines to the view that he was a foreigner sent by the caliph. Maribel Fierro is of the opinion that later chronicles confused Ibn Mughëth with his successor, thereby concocting an African origin for him.
Al-ÿAlÃÂþ ibn Mughëth set up his government in 763 in Beja, where he had the support of the local Egyptian jund (Arab army division). Although Islamic historiography and much modern historiography treats this event as an internal rebellion against the Umayyads, it is better viewed as conflict over legitimate authority between two rival caliphal lines. The temporary success of Ibn Mughëth is evidence that there existed support for the ÿAbbÃÂsid claim in al-Andalus.
The Umayyad emir ÿAbd al-RaḥmÃÂn I () avoided a pitched battle with his rival and even abandoned his capital, Córdoba, for the fortress of Carmona. Al-ÿAlÃÂþ ibn Mughëth besieged Carmona for two months, which suggests that the forces available to ÿAbd al-RaḥmÃÂn I were not large. Many Andalusë leaders must have been awaiting the result of the conflict before deciding which side to support. The Syrian jund of Seville, which had Yaḥṣubë members, may have gone over to Ibn Mughëth. According to the AkhbÃÂr majmà «Ã¿a, the Palestinian jund under GhiyÃÂth ibn ÿAlḳama al-Lakhmë marched from Sidonia to join the siege but was intercepted by an army under Badr, a freedman of ÿAbd al-RaḥmÃÂn, who negotiated its withdrawal.
The siege was ended when a well-timed sortie by the defenders caught the besiegers unprepared. Ibn Mughëth and the other ÿAbbÃÂsid leaders were killed in the fighting. His head was secretly sent to Kairouan as a warning to other would-be ÿAbbÃÂsid governors. Some sources have it sent, less plausibly, to Mecca.
The next ÿAbbÃÂsid governor, ÿAbd al-RaḥmÃÂn ibn Ḥabëb al-á¹¢iqlÃÂbë, was sent from Ifrëḳiya in 777.