Al-Khwārizmī' and he's the gentleman that definitely we credit with the name Algebra, comes from Arabic for 'Restoration' and some people also consider him to be, if not the father of Algebra, although some say he is the father, he is one of the fathers of Algebra, because he really started to think about Algebra in the abstract sense, devoid of some specific problems, and a lot of the ways that a modern mathematician would start to think about the field.