Word Origin & History
derby"type of hat," manufactured in U.S. 1850, name appears 1870, from annual Derby horse race in England, where this type of hat was worn. Race was begun 1780 by the 12th Earl of Derby; Parliament always adjourned for it, and the name was used for any major horse race after 1875. Derby the English shire
is O.E. Deorby "deer village," from deor "deer" + by "habitation, homestead," from a Scand. source (see
bylaw).