Surname מוסיל (Musil 
, מוסיל 
) , worldwide, is a common cognomen. The family name מוסיל is habitual in Czechia, where it is quite a common surname, Slovakia, where it is quite a rare surname, and Austria. Not in comparison with a country's population, this name is the most popular in Czechia, the United States, and Austria. Much less frequently, מוסיל is the forename as well as the last name.