What is the X in X-mas?
the insect, early 14c., from Old French criquet (12c.) "a cricket," from criquer "to creak, rattle, crackle," of echoic origin.
the game, 1590s, apparently from Old French criquet "goal post, stick," perhaps from Middle Dutch/Middle Flemish cricke "stick, staff," perhaps from the same root as crutch. Sense of "fair play" is first recorded 1851, on notion of "cricket as it should be played."