Family name 西默 (西默 
, Siemer 
, Seamer 
) , across the world, is quite a common surname. The last name 西默 is habitual in Estonia, where it is quite a rare surname, Germany, and Namibia. Measured by absolute frequency, it is the most numerous in Germany, the United States, and Australia. Much less frequently, 西默 is the forename as well as the last name.