Dawn? Go away?

My dentist is a lovely and charming fellow who is quite capable of subbing for Jon Stewart anytime he is out. However, I cannot for the life of me remember the names of any of the gals on his staff. To be honest, I know their names, I just do not know to whom they belong. Perhaps it would help if they didn't all look pretty much exactly alike: young, tan, long-haired brunettes. The only one whose name I can get straight is the hygeniest, Sheila, as she's a bit older and blonde. I call her the Samantha Jones of the group. Mostly I just call them all Dawn (that's the one who calls to confirm my appointment).