A couple of reports
"The next version of Fedora is to be called "Constantine". The result
was announced at FUDCon Berlin 2009 and follows a tradition of creating
linked pairs of codenames; Fedora 11 was called "Leonidas" and the link
in this case is that both Leonidas and Constantine are townships in the
state of Michigan, USA. The link must, according to the rules, not
repeat. Fedora 11, was preceded by Fedora 10, "Cambridge"; Cambridge and
Leonidas were both ships of the United States Navy."
"After having gone to the community for looking at names, Red Hat has
announced that the release of Fedora 12 will be codenamed Constantine.
This name had the most votes and was approved by Red Hat's Legal
department of being free of any potential issues. Constantine had beat
out Umbria, Orville, Rugosa, and Chilon for having the most votes."