As per the title - I can't remember this particular conspiracy theory pre V bur then I was only about 10 at the time. I know the Illuminati, Masons and other "hidden figures" have been a thing for centuries, but were the "lizard people" connected with that show?
While there's always room for more answers, you might like to see u/AncientHistory's answer to What are the origins of the lizard-people conspiracy theory?.