Douglas Harper's Etymology Dictionary
also jack-o-lantern, 1660s, a local name for a will-o-the-wisp (Latin ignis fatuus), mainly attested in East Anglia but also in southwestern England. The extension to carved pumpkins is attested by 1834, American English.
Wiktionary
alt. 1 (context idiomatic English folklore English) will o' the wisp, a strange light that attracts travellers 2 (context US tradition English) A vegetable, usually a pumpkin, but alternatively a turnip, carved into the form of a face and lighted within by a candle. Associated chiefly with the holiday Halloween. n. 1 (context idiomatic English folklore English) will o' the wisp, a strange light that attracts travellers 2 (context US tradition English) A vegetable, usually a pumpkin, but alternatively a turnip, carved into the form of a face and lighted within by a candle. Associated chiefly with the holiday Halloween.
Wikipedia
Jack O'Lantern is a fictional supervillain appearing in American comic books published by Marvel Comics.
Jack O'Lantern is the name of several fictional characters published by DC Comics.
Jack O'Lantern is an American 2004 low budget indie horror film written and directed by Ron McLellen, and starring Dave R. Watkins, Kevin L. Powers and Tracy Yarkoni. First screened at the London FrightFest Film Festival, it was released on DVD in 2005 by Lions Gate Entertainment.