The Galgo Español or Spanish Greyhound is a Spanish breed of dog of sighthound type, bred specifically for coursing hare and other game. The English greyhound is possibly a descendant of the Spanish greyhound and, for several years in the 20th century, some breeders did cross-breed Galgos and Greyhounds in order to produce faster and more powerful Galgos, specifically for track racing purposes.
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Adapted from Wikipedia, CC BY-SA 4.0 — https://en.wikipedia.org/wiki/Galgo_Espa%C3%B1ol