Johnathen is of American origin, derived from the Hebrew name Jonathan. It means 'God is gracious.' The name was introduced to Britain by the Normans and has since been used extensively in English-speaking countries. Johnathen is considered a variant spelling of the more traditional Jonathan.
The name Johnathen seems to have experienced a peak in popularity between the late 1960s and early 1990s, with a significant increase in births from 1979 onwards. The highest number of births recorded was in 1995 with 51 babies named Johnathen. However, there has been a steady decline in its popularity since the late 1990s, with fewer than 20 births per year recorded between 2003 and 2023, inclusive.