Yours, Etc.: Origins and Uses of 8 Sign-Offs
"inner membrane of a calf's fourth stomach," c.1400, probably from an unrecorded Old English *rynet, related to gerennan "cause to run together," because it makes milk run or curdle; from Proto-Germanic *rannijanan, causative of *renwanan "to run" (see run (v.)). Cf. German rinnen "to run," gerinnen "to curdle."
variety of apple, 1560s, from French reinette, literally "little queen," diminutive of reine "queen," from Latin regina (see Regina).