The name Xan is a boy's name of Greek origin meaning "defending men". Xan and is often added to lists like Unique Boy Names: Unusual and Rare and discussed in our forums with posts like "ALPHABET Drop 2 Add 1 - Girls".
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.