While watching the Co-Optional Podcast (Episode 209. after 1:47:50 when it says "anime thing"), when talking about Dragonball Fighters and how Broly and Bardock were the only 2 confirmed to be being released in future TotalBiscuit said that the names sounded like vegetables. in response Dodger said that the names of Saiyans were supposed to be vegetable puns like how the names of Bumla's family were jokes on underwear.
I admit Broly sorta sound like like Brocoli but not sure how Bardock is a joke on a vegetable, nor how Nappa or Goku (or even Kakarot) are jokes either (Gohan might since i know Gohan is sometimes used in Japanese for "food")
So what are these jokes/puns and are they categorized/themed as Dodger said?