User blog comment:Jjrockk/The Pyramid with a Top Hat/@comment-5434184-20120911022948

Trembley doesn't have a son. E Pluribus Trembley is a parody of 'E. Pluribus Unum' which means "Out of many, one" in Latin. Well... it's a reference to the Eye of Providence. Sometimes represents God watching people. Maybe they put it there because while Dipper and Mabel are uncovering the secrets of Gravity Falls, someone is watching them.

Places "Mr. Pyramid" was seen:

-In the contents of Book 3: Eye on mountain.

-Fight Fighters, beginning of the episode on an arcade machine.

-The Negative Twelve Dollar bill, of course.

-Opening of Gravity Falls.

I don't know if their is more to the list.