The name Aslan is a boy's name meaning "lion". Aslan and is often added to lists like Baby Names from Children's Books.
From the experts:
Aslan, derived from the Old Turkic for "lion," is best known in the West as the name of the heroic lion in C.S. Lewis' "Chronicles of Narnia" series, who serves as an allegorical stand-in for Jesus Christ. It was also used as a positive epithet for several Turkish emperors in the Middle Ages.