Son of Jan or Son of John
A patronymic surname of Dutch and Germanic origin, Janssen literally translates to 'son of Jan'. Jan is the low-German and Dutch form of John, which ultimately derives from the Hebrew name Yochanan, meaning 'God is gracious'.
Fewer than 5 boys were named Janssen in 2025.
US births per 5-year period, 1990–present (SSA data).
A character in the Tintin universe · The Adventures of Tintin
A character in the video game series Suikoden · Suikoden
