Cognomen Илер (Hilaire 
, Илер 
) , all over the world, is a common surname. The surname Илер is habitual in Latin America and the Caribbean, particularly Dominica, where it is a common surname, Saint Lucia, where it is quite a common surname, and Haiti (explore the name in all countries). Measured by absolute frequency, it most frequently occurs in France, Haiti, and the United States. Likewise, Илер is the forename as well as the last name.