Jason Voorhees is the main character from the Friday the 13th series. He first appeared in Friday the 13th (1980) as the young son of camp cook-turned-killer Mrs. Voorhees, in which he was portrayed by Ari Lehman. Created by Victor Miller, with contributions by Ron Kurz, Sean S. Cunningham and Tom Savini, Jason was not originally intended to carry the series as the main antagonist. The character has subsequently been represented in various other media, including novels, video games, comic books, and a crossover film with another iconic horror film character, Freddy Krueger.
Source: Wikipedia, "[en.wikipedia.org/wiki/Jason_Voorhees Jason Voorhees]", available under the CC-BY-SA License.