Courtesy name of 夏侯惇, one of 曹操's most trusted generals in the Three Kingdoms era. He lost an eye to an arrow; in 三国演义 he swallows the eye pulled out with it.
In Romance of the Three Kingdoms, Yuanrang is blinded in one eye on the battlefield.
Tips
culture
元让 is Xiahou Dun's 字 (courtesy name) - classical Chinese texts and Three Kingdoms fiction often use the 字 instead of the given name as a mark of respect.
history
The eye-eating scene, 拔矢啖睛, is the novel's invention: history records only the lost eye. That earned him the nickname 盲夏侯 'Blind Xiahou', which he hated so much that he would throw his mirror to the ground in anger.