Origin: English, Latin
Meaning: from a surname referring to someone who was from Denmark or had Danish descent.
It could also be a variant form of Dean, an occupational surname referring to someone who was either a dean or worked for one, a dean being the ecclesiastical head of a cathedral. It comes from Latin decanum meaning "ten", referring to someone who was in charge of ten subordinates. Dean is also used to refer to the head of a university or college.
It also comes from Middle English dene meaning "valley".