Lathon

From the OblivioWiki – your guide to everything Oblivion

This quest, location, item, or NPC is part of the "The Elder Scrolls IV: Knights of the Nine" official plug-in or expansion.
You can purchase it here for the PC or from Xbox Live Marketplace on the Xbox 360.

Lathon is Sir Roderic's squire. After acquiring the Relics except the Greaves and the Sword of the Crusader, Lathon will come to you himself with the Greaves. He will give you the Greaves and will talk to you concerning Sir Roderic when you return to the Priory of the Nine. You can knight him and he will become Sir Lathon.