British chemist Humphry Davy, who executed many experiments aimed to isolate the metallic, is credited as the one who named the component. The initial title proposed for your metallic being isolated from alum was alumium, which Davy proposed in an 1808 article on his electrochemical research, posted in Philosophical Transactions https://aluminium-greenhouse13345.izrablog.com/37887128/facts-about-aluminium-greenhouse-revealed