Son of Jesse
Jessen is a patronymic surname of North German and Danish origin, meaning 'son of Jess'. The root name Jess is a derivative of Jesse, which is a Hebrew name meaning 'gift'. While rare as a first name, it follows the popular trend of using surnames as given names.
Less common today
Jessen isn't in the latest US Top 1000. It last peaked at #4,797 in 2002.
US births per 5-year period, 1990βpresent (SSA data).