Terminology
The terms are often confused, and often needlessly distinguished. The term knighthood comes from the English word knight (from Old English cniht, boy, servant, cf. German Knecht) while chivalry comes from the French chevalerie, from chevalier or knight (Low Latin caballus for horse). In modern English, chivalry means the ideals, virtues, or characteristics of knights. The phrases "orders of chivalry" and "orders of knighthood" are essentially synonymous.
Martlet, 'cause I'm bored and cannot sleep tonight. Maybe I'm really not making sense, it's 3:15 a.m. here.