E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Leopards.
So the French designate the English, because their heralds describe our device as a lion leopardé. Bertrand du Guesclin, the famous Breton, declared that men devoyent bien honorer la noble Fleur-de-lis, plus quils ne faisaient le félon Liépard.