From Latin Lucianus, a derivative of Lucius. Saints Lucian, Maximian, and Julian were three missionaries to Gaul matryred at Beauvais at the end of the 3rd century. The British painter Lucian Freud was born in Berlin in 1922, the grandson of Sigmund Freud.
Muslim: from a personal name or status name based on Turkish khan ‘ruler’, ‘nobleman’. This was originally a hereditary title among Tartar and Mongolian tribesmen (in particular Genghis Khan, 1162–1227), but is now very widely used throughout the Muslim world as a personal name. In Iran and parts of the Indian subcontinent it is used as an honorific title after a person's personal name.