Knave may refer to: A rogue (vagrant), a rascal, deceitful fellow, a dishonest man Knave (playing card), another name for the jack in card games Knave (British magazine), a British softcore pornographic magazine published 1968-2015 Knave (American magazine), a short-lived American men's magazine published in 1959 The Knave, a Welsh hillfort also known as Deborah's Hole Camp In Knights and Knaves logic puzzles, a person who always lies A male domestic worker, a person who works within the employer's household (kitchen boy in Middle English) See also Jack (playing card) Knave of Hearts (disambiguation) Varlet (disambiguation)