Seth Snella

Seth Snella, or Seth Smedley in the online book, is a baby in the Snella family who appears in Diary of a Wimpy Kid: The Last Straw. The Snellas throws a half-birthday for Seth, and make the adult guests do crazy things to try and make him laugh. Mr. Snella tapes all the adults and then send the videos to "America's Funniest Families". He is the youngest Snella brother and has 4 known brothers, Shawn, Shane, Sam, and Scott. Since his half-birthday party is in June, he would have to have been born in December, and he is the only Snella whose birth month is known.