You can find the info either the normal route of Egyptian literature or here’s a different take on it;
Ptah aka Thoth is from planet Erra in the Pleiades and he’s apparently Billy Meier’s first contact. Here’s the link with a bit more info.
http://www.crystalinks.com/billy_meier.html
There’re other threads on Camelot dealing with Meier’s case (if you’re interested). Here’s one of them;
http://projectavalon.net/forum/showthread.php?t=19055
Good luck on your quest.