Leopold Wagner, Names: and Their Meaning; A Book for the Curious
“ So far from having derived its name from one of the northern suburbs of London, a Hackney-coach is simply an English rendering of coche-a-haquence, the literal French for a coach drawn by a hired horse. The word Coach (French, coche, the diminutive of the Italian conchula, a shell) really means a shell-like contrivance upon wheels. Cab is a contraction of the Cabriolet, from cabriole, a goat’s leap, in allusion to its lightness and springiness, first introduced in Paris. ”
