Last name שמאס (Shammas 
, שמאס 
) , all around the world, is quite a common cognomen. The cognomen שמאס is characteristic of Western Asia, particularly Lebanon, where it is quite a common surname, Syria, where it is quite a rare surname, and Kuwait. In absolute terms, the name is most common in Lebanon, Syria, and the United States. Very seldom, שמאס is the forename as well as the last name.