Family name Lyoun (Leon 
, Lyoun 
) , around the world, is a prevalent last name. The last name Lyoun is characteristic of Latin America and the Caribbean, particularly Saint Lucia, where it is a common surname, Guatemala, and Peru (explore the name in all countries). Measured by absolute frequency, it most frequently occurs in Latin America and the Caribbean, particularly Mexico, Peru, and Colombia. Much less frequently, Lyoun is the forename as well as the last name.