Bahdal ibn Unayf

Bahdal ibn Unayf al-Kalbi
Died	ca. mid-650s
Known for	Chieftain of Banu Kalb (first half of 7th century)
Family	Maysun (daughter) Yazid I (grandson) Hassan ibn Malik (grandson) Sa'id ibn Malik (grandson) Humayd ibn Hurayth(grandson)

Bahdal ibn Unayf ibn Walja ibn Qunafa al-Kalbi (died ca. 650s) was the chieftain of the Banu Kalb during early Muslim rule in Syria until his death in the mid-650s. A Christian like most of his tribesmen at the time, Bahdal secured a prominent role for his family and the Banu Kalb by marrying off his daughter Maysun to the future caliph Mu'awiyah I (r. 661–680), while the latter was governor of Syria (639–661). Maysun would give birth to Mu'awiyah's son and successor, Yazid I (r. 680–683). Though Bahdal died before 657, his forging of ties with the Umayyads secured his descendants and tribesmen the most prominent positions in the Umayyad court and military, so much so that partisans of the Umayyads became known as "Baḥdaliyya". Bahdal's grandchildren led the Yaman faction in the wars with Qays, a rival tribal confederation.

Bahdal belonged to the Banu Kalb's princely household, the Banu Haritha ibn Janab, and served as the tribe's preeminent chieftain. According to medieval historian al-Tabari, Bahdal's full name and genealogy was as follows: Baḥdal ibn Unayf ibn Walja ibn Qunāfa ibn ʿAdī ibn Zuhayr ibn Ḥārithah ibn Janāb al-Kalbī. He and his Bedouin tribesmen inhabited the steppes between Palmyra and Damascus by the time of the Muslim conquest of Syria in the 630s. The Banu Kalb was among the largest tribes in Syria and commanded the wider Quda'a confederation.

Though he was a Christian like most of the Banu Kalb, Bahdal forged ties with the Muslim rulers of Syria, namely from the Banu Umayya clan. He married off his daughter Maysun to Mu'awiyah I, a member of the clan and governor of Islamic Syria. According to historians Henri Lammens and Patricia Crone, Bahdal derived his prominence from this marriage though he did not play a political role himself. It is not known when Bahdal was born, but he died at an old age in the mid-650s, likely before the Battle of Siffin between the partisans of the Banu Umayya and Caliph Ali in 657. He died a Christian, and at least one of his sons and two of his daughters also remained Christians.

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