Hispanic

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from Latin Hispanicus, from Hispania ‘Spain’.

wiktionary

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Formed from the root of Latin Hispania(“Spain”) and the suffix -ic; cf. hispanicus.

etymonline

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Hispanic (adj.)

"pertaining to Spain" (especially ancient Spain) 1580s, from Latin Hispanicus, from Hispania "Iberian Peninsula," from Hispanus "Spaniard" (see Spaniard). Specific application to Spanish-speaking parts of the New World is from 1889, American English; since c. 1972 especially applied to Spanish-speaking persons of Latin American descent living in the U.S. As a noun meaning "Hispanic person" from 1972.