Trivia[]
- Henry has a younger brother, Hogarth. who is in fourth grade with Louise ("The Millie-churian Candidate").
- Henry writes graphic novels in which he has so far written 17 installments ("Carpe Museum").
- He has an interest in dinosaurs ("Carpe Museum").
- He has a rare kind of contagious acne ("Ain't Miss Debatin'").
- He sleeps using a sleep apnea machine ("Ain't Miss Debatin'").
- Jimmy Jr. doesn't know Henry's name as he calls him, "Harvey" ("Carpe Museum").
- He's part of Wagstaff School's band. He plays the saxophone. (My Butt Has a Fever)
- Despite dating Tina in "Ain't Miss Debatin'," he doesn't appear in her fantasy sequence in "Just One of the Boyz 4 Now for Now" with most of her other love interests. That is likely because she had a "total lack of attraction to him." ("Ain't Miss Debatin'")
- He knows morse code. ("UFO No You Didn't")
- He bears a resemblance to King of the Hill character, Hank Hill, and the Angry Video Game Nerd.
- He doesn't make any appearances in seasons 4 and 14.