Johnathon is of American origin, derived from the Hebrew name 'John', which means 'God is gracious'. It gained popularity during the Middle Ages when it was introduced to England by returning Crusaders. The 'thon' ending is a variant of the suffix '-ton', often used in English surnames and place names, such asxton or Brighton. Johnathon follows this pattern, giving it a distinctive yet familiar sound. Its popularity peaked in the United States during the late 20th century but has since declined slightly.
In 1986 alone, there were five babies named Jonathon.