Why is the ninth month called September?
game played with stones on ice, 1610s, from present participle of curl (v.). "The name appears to describe the motion given to the stone" [OED]. A description of a similar game is attested from Flanders c.1600.
mid-15c., metathesis of crulle (c.1300), probably from an unrecorded Old English word or from Middle Dutch krul "curly," from Proto-Germanic *krusl- (cf. East Frisian krull "lock of hair," Middle High German krol, Norwegian krull, Danish krølle "curl"). The noun is recorded from c.1600.