A character in many of Robert Heinlein's science fiction novels
In "Harry Potter and the Sorcerer's Stone," Nicolas Flamel is a good friend of Hogwart's headmaster Albus Dumbledore.
When the Greek goddess Eos asks Zeus to grant her mortal lover, Tithonus, eternal life, she forgets to also ask for eternal youth.
An Oscar Wilde character that remains young and handsome while his portrait ages.
In the 1986 movie "Highlander," Connor MacLeod is a member of the immortals, a mysterious race who die only when their heads are lopped off.
A knight of the First Crusade who, in "Indiana Jones and the Last Crusade," is tasked with guarding the Holy Grail, a crucible that grants eternal life to any who drink from it.
Methuselah is the oldest person whose age is mentioned in the Old Testament of the Bible.
A half-elven maiden in J.R.R. Tolkien's "Lord of the Rings"
clipped from: www.livescience.com 
