Husain Husamuddin

Al-Husayn Husam al-Din ibn Idris Imad al-Din was the 21st Tayyibi Isma'ili Dāʿī al-Muṭlaq in Yemen. He succeeded his brother al-Hasan Badr al-Din II in 1512, and held the post until his death in 1527, when he was succeeded by his son Ali Shams al-Din III.

Towards the end of his life Moulana's health became poor and all of the affairs of D`awat were entrusted to Syedi Hasan bin Nuh. Any correspondence received from Hind, Sind or Yemen was referred to Syedi Hasan bin Nuh and he would attend to it.

• Daftary, Farhad (2007). The Ismāʿı̄lı̄s: Their History and Doctrines (Second ed.). Cambridge: Cambridge University Press. ISBN 978-0-521-61636-2.
• Qutbuddin, Tahera (2018). "Idrīs ʿImād al-Dīn".In Fleet, Kate; Krämer, Gudrun; Matringe, Denis; Nawas, John; Rowson, Everett (eds.). Encyclopaedia of Islam, THREE. Brill Online. doi:10.1163/1573-3912_ei3_COM_32368. ISSN 1873-9830.