Cognomen Yuil (Yuil 
) , throughout the world, is a very rare family name. The cognomen Yuil is characteristic of Panama, where it is quite a rare surname, Venezuela, where it is a very rare surname, and Malaysia, where it is an extremely rare surname. Measured by absolute frequency, it most frequently occurs in Panama, the United States, and Venezuela. More frequently, Yuil is the forename as well as the last name.