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Last name Tilahun (Tilahun , טילהון , Тилахун ) , around the world, is a widespread surname. The cognomen Tilahun is habitual in Ethiopia, where it is a common surname, Lebanon, where it is quite a rare surname, and Qatar. In absolute terms, it most frequently occurs in Ethiopia, Sudan, and the United States. Likewise, Tilahun is the forename as well as the last name.