Wikipedia—
Dos Equis is a lager that was originally brewed by the German-born Mexican brewer Wilhelm Hasse in 1897. The brand was named “Siglo XX” (“20th century”) to commemorate the arrival of the new century, and the bottles were marked with the Roman numerals “XX”, or “Dos Equis” (two Xs).
A rival for the Dos Equis “most interesting” title—
— ams.org/journals/bull/1928-34-05/….
See also Al Pacino in The Devil’s Advocate… “It happened in Monterrey, a long time ago….”
Actually, according to some sources, the Dos Equis brand began in or near Veracruz.
“On April 22, 1519, Hernan Cortez disembarked on Chalchihuecan beach, where he decided to found a village and form the first colonial settlement in Mexico. That day was Good Friday, the day of Holy Week known as the day of La Vera Cruz (True Cross)— hence he chose the name of La Villa Rica de la Vera Cruz.” — Ad copy