Peter Pettigrew-How come they never say Peter on the Maurauders Map?

Timothy Bruening

2016-08-01 11:50:15 UTC

I would like your ideas
BookLover

Well, whenever he's at Hogwarts, they do. As for creating it, the
Marauders used their nicknames for each other. To further hide who
made it, if it fell into the wrong hands.

PoA: At one point, Harry DOES see Peter Pettigrew on the Map! But then Lupin confiscates it!

Why hadn't Fred and George ever seen Peter on the Map during the 3 years Ron and Scabbers had been at Hogwarts? I am certain that they would naturally have used the Map to check up on Ron, so would have seen Peter's name right on top of Ron, and come to investigate!