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Cognomen Valtr (Valtr ) , all around the world, is quite a rare family name. The cognomen Valtr is habitual in Czechia, where it is quite a rare surname, Slovakia, and Estonia, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Czechia, Slovakia, and the United States. Very seldom, Valtr is the forename as well as the last name.