Al'Khwarizmi was an Islamic mathematician who wrote on Hindu-Arabic numerals. The word algorithm derives from his name. His algebra treatise Hisab al-jabr w'al-muqabala gives us the word algebra and can be considered as the first book to be written on algebra.
Find out more at: https://mathshistory.st-andrews.ac.uk/Biographies/Al-Khwarizmi/