Peter David

Quicksilver: You know who Cerberus is, yes?
Polaris: Three-headed dog that guards the gate to Greek hell. Sure.
Quicksilver: Well, according to this, the name comes from the Greek word 'Kerberos'.
Polaris: Okay, so?
Quicksilver: So it means 'spot.'
Polaris: Again, so?
Quicksilver: So it means that Hades maned his big guard dog 'spot.'