1590s, "effigy of a man made of straw," from Jack + straw (n.); hence "man without substance or means." It also was a name of one of the leaders of the Peasants' Revolt of 1381. As the name of a game played with straw or strips, from 1801. Related: Jackstraws.
jackpot
jack-rabbit
jacks
jack-shit
Jacksonian
jackstraw
Jacob
Jacobean
Jacobin
Jacquard
Jacquerie