Pinto

google

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mid 19th century: from Spanish, literally ‘mottled’, based on Latin pictus, past participle of pingere ‘to paint’.

wiktionary

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Borrowed from Spanish pinto(“painted, mottled”).

etymonline

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pinto (n.)

"a horse marked black and white, a painted pony," 1860, from American Spanish pinto (adj.) "piebald," literally "painted, spotted," from Spanish, from Vulgar Latin *pinctus, variant of Latin pictus "painted," past participle of pingere "to paint" (see paint (v.)). The pinto bean (1916), is so called for its markings.