Alex

Alex is a unisex name, employed either as a hypocoristic or a standalone given name, derived from the Greek element ἀλέξειν (aléxein), meaning "to defend" or "to protect." Universally recognized as a diminutive for Alexander and Alexandra, Alex has, in contemporary usage, established itself as an independent given name for both men and women. Additionally, it is associated with Alexis. (Wikipedia)