Son of Jan
A patronymic surname of Dutch and Scandinavian origin, meaning 'son of Jan'. Jan is the Dutch and Germanic form of John, which ultimately derives from the Hebrew name Yochanan, meaning 'God is gracious'.
Less common today
Jansen isn't in the latest US Top 1000. It last peaked at #1,240 in 1994.
American actor and voice artist
Australian actor known for Neighbours
US births per 5-year period, 1990βpresent (SSA data).