de Vivar, better known as El Cid) and Dias in Portuguese. Like many patronymics, these have become common surnames among Iberophones worldwide. The form Diéguez is much less common; Diegues can be found in Lusophone countries. Diego and de Diego can also be found as surnames. As an ethnic term "Diego" as a metonym for a Spaniard is documented from around 1615. The term "Dago" as a generic name for Spaniards is recorded in the 19th century and may possibly be a derivation from Diego. By the early 20th century, the term dago or dego was extended as an ethnic slur applied chiefly to Italian Americans, besides also for anyone of Spanish or Portuguese descent. See also List of people with given name Diego Saint Diego (disambiguation) References Spanish masculine given names ca:Dídac nl:Diego pt:Diego