all the young men called him Irus for short
because he’d hustle messages at any beck and call.
– Homer
The Odyssey, Book 18, lines 8-9. We are told that the short version of Arnaeus’ name is "Irus," a play on "Iris," the messanger goddess. Homer is engaging in irony here, since the drunkard and beggar Irus is about as far away from divinity as you can get.