Family name Hilare (Ilar 
, Hilare 
) , all over the world, is quite a rare surname. The surname Hilare is habitual in Slovenia, where it is quite a rare surname, Philippines, and Sweden, where it is a rare surname. Not in comparison with a country's population, the name is most common in Philippines, Slovenia, and the United States. Much less frequently, Hilare is the forename as well as the last name.