The name Jenssen is of Norwegian origin, derived from the Old Norse 'Geirs' or 'Gisli', meaning 'spear'. It is a patronymic surname, originally passed down as a way to denote a father's son or daughter. Historically, it was quite common in Norway, particularly around the Oslo region. Today, Jenssen is still prevalent in Norway and also found in other Scandinavian countries, with some occurrences worldwide due to immigration patterns.
"In 2015 alone, there were five babies named Jenssen born, making up all of that year's Jenssen births with a total count of five."