Word Origin & History
merino"fine-wool breed of sheep," 1781, from Sp., possibly from Ar. Merini, a Berber family or tribe of sheep farmers in northwest Africa whose animals were imported into Spain 14c.-15c. to improve local breeds. Or from L. majorinus, from major "greater," either in ref. to size of the animals or from Sp. derivative
merino (n.) "overseer of cattle pastures," also a title of judicial officers.