Al-Abnāʾ (Arabic: الأبناء, lit. 'the sons') is a term that was used in South Arabia to refer to people whose lineage was paternally Iranian and maternally Arab. They represented a distinct community that had come into existence following the end of the Aksumite–Persian wars in the 6th century, when Iranian soldiers began intermarrying with Arab women in Sanaa and throughout Yemen.^[1] These couples' offspring and their descendants held an ethnic and cultural identity that was influenced by their mixed heritage from the Sasanian Empire and the Himyarite Kingdom, though they eventually assimilated into the society of the latter. Following the rise of Islamic prophet Muhammad in the 7th century, most of the al-Abnāʾ community adopted Islam and took part in the early Muslim conquests, including the Muslim conquest of Iran.

According to a commentary by the 10th-century Arab historian Abu al-Faraj al-Isfahani in the Kitab al-Aghani, these people were, up until this time, referred to as Banū al-Aḥrār (بنو الأحرار, lit. 'sons of the free people') in Sanaa and as al-Abnāʾ in the rest of Yemen.^[2] The names were defined as such due to a narration that told of a strong storm that hit ancient Yemen and revealed a stone inscription that stated: "Who rules Dhamar? Himyar the Good. Who rules Dhamar? The evil Abyssinians. Who rules Dhamar? The free Persians." A similar stone inscription of pre-Islamic Arabia was said to have been found underneath the Kaaba in Mecca.^[3]

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The known history of the al-Abnāʾ people covers their time between the Aksumite–Persian wars in the 6th century and the founding of Islam in the 7th century. It is unknown whether the community's religious beliefs consisted of their forefathers' Zoroastrianism or their foremothers' South Arabian paganism, or whether they adopted local Christianity. The 9th/10th-century Iranian scholar al-Tabari stated that Khurrah Khosrow, the fourth governor of Sasanian Yemen, was replaced by the governor Badhan during the reign of Khosrow II due to the former's excessive assimilation into Arab society.^[1] Badhan would later join the early Muslims as one of Muhammad's companions.

The authority of Yemen's Sasanian governors was reduced during the Byzantine–Sasanian War of 602–628; a conflict which coincided with the emergence of Muhammad as an Islamic prophet in the Arabian Peninsula. The Sasanian leaders in Yemen, including Badhan, Fayruz al-Daylami, and Wahb ibn Munabbih, responded favourably to Muhammad's diplomatic missions and formally converted to Islam by 631. Following Badhan's death, his son Shahr replaced him as governor, but was killed by the rebellious Arab tribal leader al-Aswad al-Ansi, who had claimed prophethood during the Ridda Wars. Al-Aswad was later killed by Fayruz who assumed his position as Yemen's governor. After that, another rebellion by Ghayth ibn Abd Yaghuth sought to expel the al-Abnāʾ community from Arabia as a whole. Dādawayh (دادويه), a leader of the al-Abnāʾ community, was killed during this rebellion, while Fayruz and Jushnas (Gushnasp) managed to flee with their allies and later defeated Ghayth. Fayruz and the al-Abnāʾ people were later active in the Fertile Crescent and Yemen under Umar ibn al-Khattab of the Rashidun Caliphate.^[1]

Al-Abnāʾ retained their distinct identity during the Islamic period; their nisba was al-Abnāwī (الأبناوي). These people were gradually absorbed into the local population and thus disappeared from legal records.^[1] Descendants of al-Abnāʾ live in the village of al-Furs in Wadi Rijam; in Wadi al-Sir of Bani Hushaysh District; and in Khulan al-Tyal, Bayt Baws, and Bani Bahlul.^[4]

The title al-Abnāʾ may have been the root of the title Abnāʾ al-Dawla, used to refer to the influential Persians of Baghdad during the time of the Abbasid Caliphate.^[5] The "Abna" recorded in some conflicts among the Arabs of Khorasan during the time of the Umayyad Caliphate is not related to Yemen's al-Abnāʾ community.^[1]

• Kisra legend, a story asserting historical Arab and Persian migrations to Nigeria

• Bosworth, C. E. (1983). "Abnāʾ". Encyclopaedia Iranica, Vol. I, Fasc. 3. pp. 226–228.
• Potts, Daniel T. (2012). "Arabia ii. The Sasanians and Arabia". Encyclopaedia Iranica.
• Kennedy, H. (1988). "Baghdad i. The Iranian Connection: Before the Mongol Invasion". Encyclopaedia Iranica, Vol. III, Fasc. 4. pp. 412–415.
• Zakeri, Mohsen (1995). Sāsānid Soldiers in Early Muslim Society: The Origins of ʿAyyārān and Futuwwa. Wiesbaden: Otto Harrassowitz. ISBN 978-3-447-03652-8.