Abū Muḥammad al-Ḥasan ibn al-Ḥasan ibn ʿAlī al-Hāshimī (Arabic: أَبُو مُحَمَّد الْحَسَنِ بْنِ الْحَسَنِ بْنِ عَلِي ٱلْهَاشِمِي, romanized: Abū Muḥammad al-Ḥasan ibn al-Ḥasan ibn ʿAlī al-Hāshimī, alias Hasan al-Mu'thannā; c. 661–715) was an Islamic scholar and theologian. He was a son of Hasan ibn Ali and Khawla bint Manzur. He was a grandson of the fourth caliph Ali (r. 656–661) and a great-grandson of the Islamic prophet Muhammad.
Al-Hasan ibn al-Hasan was a contemporary of Umayyad caliph al-Walid I.
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