A Dictionary of Islam / Being a cyclopedia of the doctrines, rites, ceremonies, and customs, together with the technical and theological terms, of the Muhammadan religion.

by Thomas Patrick Hughes

4. Zainu ʾl-ʿĀbidīn, son of al-Ḥusain.

5. Muḥammad al-Bāqir, son of Zainu ʾl-ʿĀbidīn.

6. Jaʿfaru ʾṣ-Ṣādiq, son of Muḥammad al-Bāqir.

7. Mūsā ʾl-Kāz̤im, son of Jaʿfar.

8. ʿAlī ar-Raẓā, son of Mūsā.

9. Muḥammad at-Taqī, son of ʿAlī ar-Raẓā.

10. ʿAlī an-Naqī, son of at-Taqī.

11. Al-Ḥasan al-ʿAskarī, son of ʿAlī.

12. Muḥammad, son of al-ʿAskarī, or the Imām Mahdī, who is supposed to be still alive, although he has withdrawn himself from the world, and that he will appear again as al-Mahdī, the Director, in the last days. [[AL-MAHDI].]

The Kings of Persia have never claimed to be in any sense the successors of the Prophet.