Al-Sayyid Muhiyudin Abu Muhammad Abdal Qadir Al-Jilani Al-Hasani Wal-Hussaini (born 11 Rabi al-Thani, 470 Hijri, in the town of Na'if, district of Gilan, Ilam Province Or Amol of Tabarestan , Persia, died 8 Rabi al-Awwal 561 AH, in Baghdad, (1077–1166 CE), was a Persian Hanbali jurist and Sufi based in Baghdad. Qadri was his patronym.
al-Sayyid Muhiyudin Abu Muhammad Abdal Qadir al-Jilani al-Hasani wal-Hussaini, the word Sayyid denotes his descent from Muhammad. The name Muhiyudin describes him as a "reviver of religion". The phrase, al-Jilani refers to Al Gilani's place of birth. However, Al-Gilani also carried the epithet, al-Baghdadi, referring to his residence and burial in Baghdad. The phrase al-Hasani wal-Hussaini affirms his lineal descent from both Hasan ibn Ali and Hussein ibn Ali, the grandsons of Muhammad.