Family name Yonly (Yonly 
) , worldwide, is a rare last name. The surname Yonly is habitual in Liberia, where it is quite a rare surname, Burkina Faso, where it is a rare surname, and Honduras, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in Liberia, Burkina Faso, and the United States. Much less frequently, Yonly is the forename as well as the last name.