The meaning of Christiansen is 'the son of Christ' and 'the follower of Christ'. The name has been adapted from the Latin name 'Cristianus', which also means 'follower of Christ'. This name is common in Denmark, it is usually ascribed to the male gender, but it also used as a surname. Although it is a popular Danish name, you will find a lot of Christiansens in the US.
The name Christiansen has a lot of variations which include Christine, which is commonly used for the female gender. Christine has the same meaning as Christiansen that is 'follower of Christ'. The spelling of Christiansen has evolved over the years, and some are still in use. Some people spell Christiansen as Kristiansen or Christensen. Famous people bearing the name Christiansen are Anna Grace Christiansen, an American cyclist, and Hayden Christensen, who played Sebastian Shaw in 'Star Wars: Return Of The Jedi'.