Family name Ionathan (Ionathan 
, Йонатхан 
, ג'ונתן 
) , across the world, is a very rare last name. The cognomen Ionathan is habitual in Greece, where it is a rare surname, Israel, where it is a very rare surname, and Venezuela, where it is an extremely rare surname. In absolute terms, this name is the most popular in Greece, Mexico, and Russia. More frequently, Ionathan is the forename as well as the last name.