Words related to frog
variety of apple, mid-15c., renette, from Old French rainette, diminutive of raine, reine "frog," from Latin rana "frog," which probably is imitative of croaking (compare frog (n.1)). If so, so called for its speckled skin like a frog's. The other possibility is that the Old French name of the apple is literally "little queen," a diminutive of reine "queen," from Latin regina (see Regina). OED, which leans toward this suggestion, suggests the other is folk etymology.