Cognomen 西弗 (Seaver 
, 西弗 
, Seever 
) , across the world, is quite a rare last name. The surname 西弗 is habitual in Ireland, where it is quite a rare surname, the United States, and Estonia, where it is a rare surname. In absolute terms, it most frequently occurs in the United States, Canada, and Ireland. Much less frequently, 西弗 is the forename as well as the last name.