Last name Osilia (Osilia 
) , across the world, is a very rare surname. The cognomen Osilia is characteristic of Latin America and the Caribbean, particularly Venezuela, where it is a rare surname, Honduras, where it is a very rare surname, and Colombia. In absolute terms, the name is most common in Latin America and the Caribbean, particularly Venezuela, Mexico, and Colombia. More frequently, Osilia is the forename as well as the last name.