Content-Type: text/shitpost

Who else is credited with inventing one or more letters of the alphabet? Russian ‘ё” was apparently proposed by Ekaterina Romanova-Dashkova. I think I remember a story about Peter the Great inventing a different letter. (Looked it up, it is “Я”, and we still have the notes he made while he was deciding what it should look like.) And of course Sejong the Great is credited with the invention of the entire Korean alphabet and scholarly consensus is that he not only planned and oversaw the project but also made technical contributions.

Are there any others? Anything like that in the Latin alphabet? Do we know who first distinguished between “u” and “v” or “i” and “j”? The Scandinavian letter “Å” occurred in the 20th century but Wikipedia doesn't attribute it to any particular person.

Oh, I know, Sequoyah invented the entire Cherokee writing system. OK, let's restrict the question to people who contributed a few letters to existing scripts. (Sorry, Sejong!)