Last name Мокус (Mockus 
, Мокус, Mocus 
) , all over the world, is quite a rare cognomen. The last name Мокус is habitual in Lithuania, where it is quite a common surname, Latvia, where it is quite a rare surname, and Albania, where it is a rare surname. Not in comparison with a country's population, it is commonest in Lithuania, the United States, and the United Kingdom.