A.B.D.R. Eagle, 'Al-Hadi Yahya b. al-Husayn b. al-Qasim', New Arabian Studies 2. Exeter 1994, p. 117; http://www.almajalis.org/forums/viewtopic.php?f=25&t=2632 (in Arabic). The line of descent is al-Hasan bin Ali - Zaid - al-Hasan - al-Qasim - Abd ar-Rahman - Ja'far - Muhammad - Ali - al-Husayn - Muhammad - Abdallah - al-Hasan - Abdallah - Muhammad - Ahmad - Muhammad - Yahya bin Muhammad as-Siraji.
