 Another word, "divvie" or "divvy" ("idiot"), seems to come from the Co-op dividend, or from the two Davy lamps (the more explosive Scotch Davy used in 1850, commission disapproved of its use in 1886 (inventor not known, nicknamed Scotch Davy probably given by miners after the Davy lamp was made perhaps by north east miners who used the Stephenson Lamp), and the later better designed Davy designed by Humphry Davy also called the Divvy.