“Yeah that was a bit strange. It is interesting to see how people think .. or not think. Whoever wrote the note likely signed their name as Roy as the note and Roy are in the handwriting and ink.”
Others have said it looks more like “Ray”, and there was a Ray in her class. It looks like just the last name was added. Adding the DA was the tip-off.
The signature looks like “Ray” to me.
It also looks like the signature was added to a pre-existing inscription.