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- Odin/*Wōdanaz - the chief god in Scandinavian/Germanic paganism (The poem Hávamál)Runic alphabet Futhark (Later Futhorc) c. 150 AD (?) per tradition.
- Ogma - legendary Irish deified chieftain, also ascribed invention of Ogham writing c. 1875 BC (?) according to tradition.
- Ong Kommadam - Laotian freedom fighter, developed the Khom script, first used 1926.
- Osman Yusuf Kenadid - Somali, invented Osmanya script c. 1921.
Read more about this topic: List Of Inventors Of Writing Systems