As the license on the website says “name of Carnegie Mellon University” it only means that you should not use the name Carnegie Mellon University, not names made by CMU, esp. as the name Panda3D was made up by Disney, not CMU as far as I know. In my opinion it wouldn’t even make sense to forbit people to tell others their games were made by Panda3D while on the other hand it makes total sense to forbit them to say Disney or CMU are endorsing the making of some games by only using their open sourced engine.
PS.: The official license of P3D can be found here if you haven’t found it yet: https://www.panda3d.org/license/