In Encounter 29: Arena of Kord in Madness at Gardmore Abbey the players face an enemy leader called:
Leralix, Minotaur Magus (L) Level 9 Controller (Leader)
Because Leralix is a unique named monster, I don't see how knowledge about a group of monsters, in this case minotaurs, would really help identify the powers of a unique boss.
What is the official ruling on knowledge checking the powers of unique monsters?