Meaning unknown. It is used as a Russian form of Bademus, but it may actually be derived from the Slavic name Vadimir or else from an Old Norse source.
Italian form of Amadeus. A notable bearer of this name was Amedeo Avogadro (1776-1856), an Italian chemist most famous for the constant that now bears his name: Avogadro’s Number. Another famous bearer was the Italian painter and sculptor Amedeo Modigliani (1884-1920).