Lucian is a sleeker, more sophisticated version of Lucius that is climbing in tandem with other Lu-starting names, now ranking at Number 608 in the USA and 111 on Nameberry.
Historically, the name was made famous by the ancient Greek satirist Lucian of Samosata--sometimes considered the father of science fiction-- and by the third century St. Lucian.
A modern bearer was Berlin-born British painter Lucian Freud, grandson of Sigmund. In pop culture, Lucian the Lycan is a werewolf in the Underworld movies.
Lucian was picked by Indie actor Steve Buscemi. Lucien is the French version. The attractive Italian form is Luciano, as in Pavarotti.