Hmm . . . wikipedia says:
Prince Christian of Denmark will be, according to near-unanimous media reports and popular speculation, the name of the baby boy born on 15 October 2005 to Frederik, Crown Prince of Denmark and his wife, the Australian-born Crown Princess Mary. As their firstborn child, the baby is second-in-line to the Danish throne, and will become the heir apparent when his father ascends the throne as king. The name of the child, though not yet officially announced, is widely expected to be Christian; since the 16th century Danish kings have traditionally been named "Frederik" or "Christian" by turns.
Nothing is definite yet . . .