Who invented the name algebra?

Answer 1

The word algebra comes from the Arabic word الجبر "Al-jabr"("completion"). Although algebra is far older, it was introduced to the Arabic world by al-Khwarizmi in his book "The Compendious Book on Calculation by Completion and Balancing", written in about 830 AD, as a name for a method of solving quadratic equations. The word came into English via a twelfth century Latin translation of his book ("Liber algebrae et almucabala").