Complex sentence: He was also one of the earliest mathematicians to recognize Al-Khwarizmi's contributions to algebra, defending him against Ibn Barza who attributed some of the achievements of al-Khawarizmi to his grandfather, ʿAbd al-Hamīd ibn Turk.
Split into simpler sentences: He was also one of the earliest mathematicians to recognize Al-Khwarizmi's contributions to algebra. He even came to his defense when Ibn Barza attributed some of the achievements of al-Khawarizmi to his grandfather, ʿAbd al-Hamīd ibn Turk.