Yours, Etc.: Origins and Uses of 8 Sign-Offs
c.1400, of uncertain origin, perhaps from Middle French esculette "a little dish" (Modern French écuelle), diminutive of escuele "plate," from Latin scutella "serving platter" (see scuttle (n.)); or formed in English from skele "wooden bucket or pail" (early 14c.), from a Scandinavian source (cf. Old Norse skjola "pail, bucket").