Son of Jan
A patronymic surname of Dutch and Germanic origin, meaning 'son of Jan'. Jan is the Dutch and Scandinavian form of John, which ultimately derives from the Hebrew name Yochanan, meaning 'God is gracious'.
Less common today
Janzen isn't in the latest US Top 1000. It last peaked at #5,173 in 1996.
Former NFL safety for the New York Giants
US births per 5-year period, 1990βpresent (SSA data).