Jathen is of American origin, derived from the name Jethro. It means 'gift' or 'excess'. The name gained popularity in the United States during the mid-20th century and has maintained a steady presence since then.
"The name Jathen had a significant increase in popularity from 2007 onwards, with the highest number of births recorded in 2007 at 19. However, it seems to have declined since then, with only 6 births each in 2013 and 2015."