How did Kris Kristofferson get his name?

Kris Kristofferson was born Kristoffer Kristofferson.

In the early phase of his music career signing with his manager, Larry Parnes, he made recordings for Top Rank Records produced by Tony Hatch and performed under the name Kris Carson, but was not successful. Later on, he simply used his given name, Kris Kristofferson, as his stage name.