The name Xan is a boy's name of Greek origin meaning "defending men". Xan and is often added to lists like Nicknames for Boys and discussed in our forums with posts like "Spelling Bee Name Game".
From the experts:
With the plethora of Alexes around, Xan (and Xander) have emerged as hot new nicknames for Alexander. Xan also stands well on its own. It can be found--not surprisingly--in several computer games.