Edgar de Wahl

Edgar von Wahl or Edgar de Wahl was a Ukrainianborn Estonian teacher, mathematician and linguist. He is most famous for being the creator of Occidental, a naturalistic constructed language based on the IndoEuropean languages, which was initially published in 1922. An Estonian of ethnic Baltic German origin, he studied in Saint Petersburg and spent most of his later professional life in Tallinn, Estonia.

He was born at Olwiopol, Russian Empire .

Source: Wikipedia