User blog comment:The Milo Murphy's Law Wiki Guy/Swamp Theory: Theme Song Analysis (With Points Made By Other People and Points Made By Me)/@comment-35920089-20190612061639

I like these theories, especially Hop Pop having some connection to the jewels. In Gravity Falls Grunkle Stan had a huge secret (being his twin brother and a lot of his past) and maybe they could make an easter egg reference by having Hop Pop have a secret connection to a main plot point. The reason I'm making this connection is that Grunkle Stan is essentially a combination of sort of a Grandpa and Uncle character (which is why they make the pun of a great uncle Stan or "Grunkle Stan") in this case Hop Pop is the grandfather of Sprig and Polly. Well, there's my theory :)