late Old English cnafa "boy, male child; male servant," from Proto-Germanic *knabon- (source also of Old High German knabo "boy, youth, servant," German knabe "boy, lad") [..]

a dishonest or unscrupulous man

a man who is not honest

(male) servant knaves

 a boy; serving-man.

Descended from the Old English word "cnafa" which just meant, "youth."

The term knave means a false, dishonest, or deceitful person. To call or address a man a knave has been held to be actionable. It is an obsolete word, seldom used today.

A lad, a garcon, a servant. (Anglo-Saxon, cnáfa; German, knabe.) The knave of clubs, etc., is the son or servant of the king and queen thereof. In an old version of the Bible we read: “Paul, [..]

n.(1) "knave, servant; peasant, churl; boy (also as adj.; s.v. knave-child n. MED)," s.v. knave sb. OED, knave-child OED. KEY: knave@n1 knave@n1#adj

n1#adj 5 knave 5

n1 22 knave 20 knaves 2

Servant take

The jack, the fourth-highest ranking card of a suit. This term is obsolete in American usage, and obsolescent elsewhere, although it had considerable currency in England and Continental Europe until t [..]

Any jack.

jack

Any jack.

(archaic) A boy; especially, a boy servant. (archaic) Any male servant; a menial. A tricky, deceitful fellow; a dishonest person; a rogue; a villain. *(in Modern English translation), ''The Can [..]