Ansen is of Scandinavian origin, derived from the Old Norse personal name Ásgeirr, which consists of the elements áss 'god' and geirr 'spear'. It was brought to England by early Norse settlers and has been in use there since the Middle Ages. The name Ansen is associated with a saint, Saint Osen, who was martyred in Ireland during the 7th century. Today, Ansen is considered a rare but distinctive name choice, often favored for its unique sound and Scandinavian heritage.
The name Ansen experienced fluctuating popularity over the years, with a significant increase since 2004. From 1977 to 2003, there were fewer than 10 births per year, with no notable trends. However, beginning in 2004, there was a steady rise in popularity, peaking at 16 births in 2014 and again at 13 births in both 2016 and 2023. Overall, the name Ansen has seen 257 births between 1977 and 2023.