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Cognomen 仙石 (Sengoku , 仙石) , in the entire world, is a rare family name. The last name 仙石 is characteristic of Bolivia, where it is a rare surname, Japan, where it is a very rare surname, and Chile. In absolute terms, the name is most common in Japan, Bolivia, and the United States. More prevalently, 仙石 is the forename as well as the last name.