Anyways this chapter puts to rest the “buggy is Rocks son” theory
Alternate theory: Rocks had a mistress. Harald had multiple wives as well (polyamory seems more common in Elbaph).
God Valley was a known nation with trade and whatnot. What if Buggy comes from a hidden island, or one that's hard to get to?
I think Buggy's Mom comes from the Secret Clown Tribe/Clown Island. The Buccaneers carried Nika's Will through Song/Dance, but, humor is also a huge part of Joy/Joy Boy.
I believe Buggy's Tribe, the Clown Tribe, fought against depression/despair through laughter/humor.
JUGGY IS REALLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL
What did Oda name the Giant Mural? That's right, the Harley
I swear, if Clown Haki is real... I won't know what to do with my nose...
I think Buggy is straight up the King of a Kingdom. The Clown Kingdom.
Roger regretted attacking Rocks, once he realized Rocks was trying to save his wife/kid on God Valley. Roger, despite being rougher than Luffy, is a good dude when it comes to women/children/animals:
I can 1000% see Roger feeling horrible about Rocks' Wife/Teach's Mom dying, and adopting Buggy.
Buggy the Clown = the key to Laugh Tale. Roger went to Clown Kingdom, to research their connection to Joy Boy/Nika and the Ancient Kingdom. The Clown Kingdom probably has knowledge of Laugh Tale, or at least vague hints about it.
Buggy's Mom died in grief over Rocks' death. To honor Rocks, Roger adopted Buggy, possibly due to Shanks befriending him as well.
Rock's Sons were raised by Newgate, his Nakama, and Roger, his Rival. Like Teach, Buggy is the odd-one-out of the Roger Pirates, who never felt like he was on Shanks' level, and abandoned his Captain's goals to chase personal power.
I think the Clown Tribe lives on/guards Lodestar, the last Island in the Grandline, that leads to Laugh Tale. The "Clowns" lead to Laugh Tale (also possible Buggy is straight up a child from Laugh Tale/the remnants of the Ancient Kingdom).
What is Buggy's epithet?
Buggy the Star Clown
Star Clown = Lodestar
Roger went to Lodestar 39 years ago: but, we know he had to go around the Grand Line twice.
I think Rocks went to Lodestar first, and met Buggy's Mom there, then honked her: Roger returned to Lodestar after God Valley, possibly due to Rocks telling him about his other kid.
I think Kuma saved Teach, and Rocks possibly saw this happening (Kuma #1 Forever).
Rocks then tells Roger, as he's dying: "Roger... truth is... I have another kid... on Lodestar... with the Clown Tribe... I loved my wife, but... hah, her nose was so cute... My son, Buggy... they're going to go after him, and my lover, same way they did God Valley. Please... protect my family, Roger. You are my rival, and I hate your guts... but I know you're a good man. Don't let the Government take the rest of my family. Let them live..."
This parallels to Garp adopting Ace, Roger's Son
YOU CAN'T ESCAPE THE PARALLELS, ROO, THEY'RE FUCKING EVERYWHERE