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Cognomen Landau (Landau , 兰多 , לנדאו , along with others...) , throughout the world, is a common surname. The last name Landau is characteristic of Israel, where it is quite a common surname, Panama, where it is quite a rare surname, and Bosnia and Herzegovina. Measured by absolute frequency, it is commonest in the United States, Germany, and Israel. Very seldom, Landau is the forename as well as the last name.