- HATEM B. MAHMOUD B. ZAHRAH
(449 - 498 A.H) Dai. Born in Sirmin. Close friend of Hassan bin Sabbah*. Studiedat "Court of Dawat" and Dar-al-Hikmat*". Was found dead in 498 A.H.
- HAYDER ALI, 30è. PIR
Named by Imam Abd as-Salaam. Sent numerous dais to Turkey and Central Asia. Died during the Imamat of Imam Abuzar Ali.
- HAYTHAM AL-BASRI, al-HASSAN B.
(962-1038) Famous mathematician and physicist born in Basra. Imam Al-Hakim asked him to study and regulate the damage caused by the floods of the River Nile.
- HAYTHAM, al-
(9th Century) Nephew of Ibn. Hawshab* who sent him as a missionary to Sind in 270/884.
- HAYYAN, JABIR IBN.-
(2nd/8th Century). (born in730 AD). Called Geber in the West. Was the pupil of Imam Jafar Sadiq. Famous alchinist and author of 3,000 works including the "Balance of Letters" sv. PaulKraus.*
- HULWANI, al-
(8th Century) He was a Dai sent with Abu Sufiyan to Northern Africa by Imam Jafar Sadiq in 145/762-763.
- HUSSAM AL-DIN BIN DAMALAJ
Professor at Dar-ad-Diwan at Alep. Sent to Raqq to organise the influx of Ismaili immigrants whose destination wasAleppo.
- HUSSEYN IBN JAWHAR.
Son of the general Jawhar* Was the Vazir of Imam Hakim who gave him the title "Qaid ul-Qudat" He had secrect dealings with Abu Rakwa* and was most probably executed.
- HUSSEYN, IMAM
626-680 (Imam in 661).Born in Madina .Led a quiet and tranquille life following the assination of H .Aly. On October 10 680, he became martyrs at Karbala with Imam Hussein and72 family members .
- HYDER SHAH, SEYYED.
Lived in Kharadar, Karachi in the "Kothi de Hyder Shah"on Imamwara street.Was engaged to Imam Begum*. He is buried in a cemetery of Miran Pir. His mauseleum is at the cemetery.

