Family name Cruma (Cruma 
, Crumble 
) , in all the world, is a rare cognomen. The last name Cruma is habitual in the United States, where it is a rare surname, Australia, where it is a very rare surname, and the United Kingdom. In absolute terms, this name is the most popular in the United States, the United Kingdom, and France. Very seldom, Cruma is the forename as well as the last name.