# Abdallah al-Aftah

ʿAbdallāh al-Afṭaḥ ibn Jaʿfar al-Ṣādiq (Arabic: عبدالله الافطح بن جعفر الصادق, d. 766 CE / 149 A.H.) was the eldest son of Ja'far al-Sadiq (after al-Sadiq's death) and the full-brother of Isma'il ibn Jafar. Abdallah's title "al-Aftah" derives from the Arabic words "aftah al-ra’s" (broad-headed) or "aftah al-rijlayn" (broad-footed) used to describe his appearance.

## Life

During the lifetime of his father, Abdallah al-Aftah had supported the revolt of his relative Muhammad al-Nafs al-Zakiyya.
Following Ja'far al-Sadiq's death, the majority of Ja'far's followers accepted Abdallah al-Aftah as their new Imam. These followers were known as the Fathites and, according to the Mu'tazili heresiographer Abul-Qasim al-Balkhi al-Ka‘bi (d.319 A.H. / 931 CE), they were the biggest and most important section of the followers of Ja'far al-Sadiq. To support his claims, Abdallah al-Aftah seems to have claimed a 2nd Nass from his father (following Ismā'īl's demise) and his adherents cited a supposed Hadith from Ja'far al-Sadiq to the effect that the Imamate must be transmitted through the eldest son of the Imam. However, when Abdallah al-Aftah died childless about 70 days after the death of his father, the bulk of his supporters went over to his brother Musa al-Kazim. Other Fathites considered Abdallah al-Aftah the 7th Imam and Musa al-Kazim the 8th Imam, while others believed the Imamate came to an end when Abdallah al-Aftah died. Another group invented a son for Abdallah al-Aftah, called Muhammad ibn Abdallah al-Aftah, because they unconditionally believed the Imamate could only be inherited from father to son, rather than from brother to brother. This group also claimed that Muhammad ibn Abdallah al-Aftah was the promised Mahdi.

## As "Sāhib al-Haqq"

In a letter sent to the Isma'ili community in Yemen by the first Fatimid caliph, Abdallah al-Mahdi Billah, which was reproduced by Ja'far ibn Mansur al-Yaman, Abdallah al-Aftah was referred as Sāhib al-Haqq or the legitimate successor of Ja'far al-Sadiq, in an attempt to explain the genealogy of his ancestors. Instead of tracing his descent to Isma'il ibn Jafar and his son Muhammad ibn Ismail, al-Mahdi Billah designated al-Aftah as his forefather. According to al-Mahdi Billah, al-Aftah had called himself 'Isma'il ibn Ja'far' for the sake of taqiyya, and each of his successors had assumed the name Muhammad. Al-Mahdi Billah explained the genealogy of the Fatimid Caliphs and claimed Fatimid ancestry by declaring himself to be ʿAli ibn al-Ḥusayn ibn Aḥmad ibn ʿAbadullāh ibn ʿAbd Allāh ibn Jaʿfar al-Sadiq. But the Imamah (Ismaili doctrine) was later formulated in a different manner since ʿAbdallah al-Mahdi Billah's explanation of his ancestry was not accepted by his successors.

### Position in the Ismā'īlī-Imāmah doctrine
## Genealogy

| Jāʿfar al-Sādiq (Imamāh‘Shi'ā) | Jāʿfar al-Sādiq (Imamāh‘Shi'ā) | Jāʿfar al-Sādiq (Imamāh‘Shi'ā) | Jāʿfar al-Sādiq (Imamāh‘Shi'ā) | Jāʿfar al-Sādiq (Imamāh‘Shi'ā) | Jāʿfar al-Sādiq (Imamāh‘Shi'ā) | | | Fatimah bint al-Hussain'l-Athram b. al-Ḥasan b. Ali | Fatimah bint al-Hussain'l-Athram b. al-Ḥasan b. Ali | Fatimah bint al-Hussain'l-Athram b. al-Ḥasan b. Ali | Fatimah bint al-Hussain'l-Athram b. al-Ḥasan b. Ali | Fatimah bint al-Hussain'l-Athram b. al-Ḥasan b. Ali | Fatimah bint al-Hussain'l-Athram b. al-Ḥasan b. Ali | | | | | | | | |
| Al-Aftāh (Fatahīyyah) | Al-Aftāh (Fatahīyyah) | Al-Aftāh (Fatahīyyah) | Al-Aftāh (Fatahīyyah) | Al-Aftāh (Fatahīyyah) | Al-Aftāh (Fatahīyyah) | | | Ismā‘il (Ismā‘il’īyyah) | Ismā‘il (Ismā‘il’īyyah) | Ismā‘il (Ismā‘il’īyyah) | Ismā‘il (Ismā‘il’īyyah) | Ismā‘il (Ismā‘il’īyyah) | Ismā‘il (Ismā‘il’īyyah) | | | | | | | | |
| Muhammad | Muhammad | Muhammad | Muhammad | Muhammad | Muhammad | | | Muhammed | Muhammed | Muhammed | Muhammed | Muhammed | Muhammed | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | Al-Wafi | Al-Wafi | Al-Wafi | Al-Wafi | Al-Wafi | Al-Wafi | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | At-Tāqī | At-Tāqī | At-Tāqī | At-Tāqī | At-Tāqī | At-Tāqī | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | Ar-Rāḍī | Ar-Rāḍī | Ar-Rāḍī | Ar-Rāḍī | Ar-Rāḍī | Ar-Rāḍī | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | Mahdi Billāh | Mahdi Billāh | Mahdi Billāh | Mahdi Billāh | Mahdi Billāh | Mahdi Billāh | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | Fatimids (Ismailism) | Fatimids (Ismailism) | Fatimids (Ismailism) | Fatimids (Ismailism) | Fatimids (Ismailism) | Fatimids (Ismailism) | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | Al-Qā'im | Al-Qā'im | Al-Qā'im | Al-Qā'im | Al-Qā'im | Al-Qā'im | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | Al-Mansur | Al-Mansur | Al-Mansur | Al-Mansur | Al-Mansur | Al-Mansur | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | Al-Mu'izz | Al-Mu'izz | Al-Mu'izz | Al-Mu'izz | Al-Mu'izz | Al-Mu'izz | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | Al-Aziz | Al-Aziz | Al-Aziz | Al-Aziz | Al-Aziz | Al-Aziz | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | Al-Hakim | Al-Hakim | Al-Hakim | Al-Hakim | Al-Hakim | Al-Hakim | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | Az-Zahir | Az-Zahir | Az-Zahir | Az-Zahir | Az-Zahir | Az-Zahir | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | Al-Mustansir | Al-Mustansir | Al-Mustansir | Al-Mustansir | Al-Mustansir | Al-Mustansir | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Nizār al-Muṣṭafá (Nizāriyyah) | Nizār al-Muṣṭafá (Nizāriyyah) | Nizār al-Muṣṭafá (Nizāriyyah) | Nizār al-Muṣṭafá (Nizāriyyah) | Nizār al-Muṣṭafá (Nizāriyyah) | Nizār al-Muṣṭafá (Nizāriyyah) | | | Muhammad ibn Abū Tamīm | Muhammad ibn Abū Tamīm | Muhammad ibn Abū Tamīm | Muhammad ibn Abū Tamīm | Muhammad ibn Abū Tamīm | Muhammad ibn Abū Tamīm | | | Al-Musta‘lī (Musta‘līyyah) | Al-Musta‘lī (Musta‘līyyah) | Al-Musta‘lī (Musta‘līyyah) | Al-Musta‘lī (Musta‘līyyah) | Al-Musta‘lī (Musta‘līyyah) | Al-Musta‘lī (Musta‘līyyah) |
| | | | | | | | | | | | | | | | | Al-Āmīr | Al-Āmīr | Al-Āmīr | Al-Āmīr | Al-Āmīr | Al-Āmīr | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | Alamut Castle (Hassasins) | Alamut Castle (Hassasins) | Alamut Castle (Hassasins) | Alamut Castle (Hassasins) | Alamut Castle (Hassasins) | Alamut Castle (Hassasins) | Al-Hāfiz (Ḥāfiziyyah) | Al-Hāfiz (Ḥāfiziyyah) | Al-Hāfiz (Ḥāfiziyyah) | Al-Hāfiz (Ḥāfiziyyah) | Al-Hāfiz (Ḥāfiziyyah) | Al-Hāfiz (Ḥāfiziyyah) | | | Aṭ-Ṭayyib (Ṭayyibiyyah) | Aṭ-Ṭayyib (Ṭayyibiyyah) | Aṭ-Ṭayyib (Ṭayyibiyyah) | Aṭ-Ṭayyib (Ṭayyibiyyah) | Aṭ-Ṭayyib (Ṭayyibiyyah) | Aṭ-Ṭayyib (Ṭayyibiyyah) |
| | | | | Al-Zāfir | Al-Zāfir | Al-Zāfir | Al-Zāfir | Al-Zāfir | Al-Zāfir | | | Yūssuf | Yūssuf | Yūssuf | Yūssuf | Yūssuf | Yūssuf | | | | |
| Nizārī Imāmah | Nizārī Imāmah | Nizārī Imāmah | Nizārī Imāmah | Nizārī Imāmah | Nizārī Imāmah | | | Al-Fā'iz | Al-Fā'iz | Al-Fā'iz | Al-Fā'iz | Al-Fā'iz | Al-Fā'iz | | | Taiyabi Dā'ĩs | Taiyabi Dā'ĩs | Taiyabi Dā'ĩs | Taiyabi Dā'ĩs | Taiyabi Dā'ĩs | Taiyabi Dā'ĩs |
| | | | | | | | | Al-'Āḍīd | Al-'Āḍīd | Al-'Āḍīd | Al-'Āḍīd | Al-'Āḍīd | Al-'Āḍīd | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | Nizārī Ismāilism | Nizārī Ismāilism | Nizārī Ismāilism | Nizārī Ismāilism | Nizārī Ismāilism | Nizārī Ismāilism | | | | | | | | | Dawoodi Dā'ĩs | Dawoodi Dā'ĩs | Dawoodi Dā'ĩs | Dawoodi Dā'ĩs | Dawoodi Dā'ĩs | Dawoodi Dā'ĩs | | |