Rachel Lang. He immediately recognized the name placing it with pieces that had been hung in the hall he frequented on his way to the campus dark rooms and he did think he'd met her. Met her, even though he couldn't remember them spending much time around each other, but then he could have seen Donnie here and there around the building or at some of the artsy functions on campus.
"Hey I think I've met her. I've seen some of her stuff. Guess next semester she'll be submitting for the junior exhibit."
So maybe the mystery was solved and that was where he knew Donnie from.