As Mamy's link material briefly outlines, re 'aluminium' as opposed to the American version ‘aluminum', Sir Humphrey Davy - who discovered it in 1807 - originally called it 'alumium' without an 'ni', before altering it to ‘alumina' and then changing it yet again to 'aluminum' still without the second 'i'.
Later, the editor of a British scientific journal changed it to 'aluminium' "in preference," he said, "to aluminum which has a less classical sound."
However, it has to be said that the Englishman who discovered it called it exactly what the AMERICANS now call it, not what WE now call it! The supposedly "missing i" British people often refer to didn't GO... in fact, it CAME!
So who's really right...those who accept the discoverer's nomenclature or those who accept an obscure magazine editor's nomenclature? If I had ever discovered and named something major, I'd be rather pee'd off if some journalistic hack just changed it!