Finn Mertens (also known as Finn the Human) is the main protagonist in Adventure Time. He also appeared in the spin-off series Adventure Time: Distant Lands and returned in the spin-off series Adventure Time: Fionna & Cake. He was voiced by Jeremy Shada in most appearances. The character made his debut in the original pilot, where he is named "Pen" and voiced by Zack Shada, Jeremy's older brother. Jonathan Frakes voices Finn as an adult in some appearances and David Bradley voiced Finn as an eld
Adventure Time Wiki page for Fionna and Cake series says this. Does anyone know if there is any truth to this release date, or what the source for it is? : r/adventuretime
Finn Adventure Time+BreezeWiki
Penelope, Adventure Time Wiki
Finn's swords, Adventure Time Wiki
Aventure Time!!. Adventure time, Adventure time wiki, Adventure
Image - Finn.PNG - The Adventure Time Wiki. Mathematical!
Warren Ampersand, Adventure Time Wiki
Finn, Adventure Time Wiki
Flame Princess, Adventure Time Wiki
Dogs, Adventure Time Wiki
List of Adventure Time episodes - Wikipedia
Marceline, Adventure Time Wiki