Almost 20 years ago I signed up for my first online e-mail account. After trying a few attempts to use unoriginal variations of my name and discovering that they were already taken, I got frustrated and chose the most obscure name that I could think of as my alias.
The Song of Roland is an ancient poem about the the knight Roland and his defense of Charlemagne's rear army as the army pulled out of Spain. A fellow knight was named Oliver, and Oliver's sword was named Halteclere.
"[Says Roland] Battle we'll have, both long and keenly set, Never has man beheld such armies met. With Durendal my sword I'll strike again, And, comrade [Oliver], you shall strike with Halteclere. These swords in lands so many have we held, Battles with them so many brought to end, No evil song shall e'er be sung or said."