Family name Щема (Scema 
, Schema 
, Щема 
) , in all the world, is a rare surname. The family name Щема is habitual in Italy, where it is a rare surname, Costa Rica, where it is a very rare surname, and the United States. Measured by absolute frequency, it is commonest in Italy, the United States, and Russia. Very seldom, Щема is the forename as well as the last name.