Caliph Al-Hasan ibn ‘Ali is the grandson of which Islamic prophet?
Mujtaba Al-Mujtaba (Arabic: اَلْـمُـجْـتَـبَى‎ ‎ ) is an Arabic word which means "The Selected One" or "The Chosen One among many." It is a title of the Islamic "Nabi" (Arabic: نَـبِي‎ ‎ , Prophet) Muhammad, and his grandson, the Caliph Al-Hasan ibn ‘Ali.
Al-Husayn ibn Sa'id Abu 'Abdallāh al-Husayn ibn Sa'id ibn Hamdan was a member of the Hamdanid dynasty, grandson of its founder, Hamdan ibn Hamdun, and cousin of the emirs Nasir al-Dawla and Sayf al-Dawla.