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Last name 立木 (立木 , Tachiki , Tsuiki ) , globally, is a rare surname. The cognomen 立木 is habitual in Armenia, where it is a rare surname, Singapore, where it is a very rare surname, and New Zealand. In absolute terms, it most frequently occurs in China, the United States, and Brazil. More frequently, 立木 is the forename as well as the last name.