Amigo

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mid 19th century: Spanish.

wiktionary

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Borrowed from Spanish amigo(“friend”), from Latin amīcus(“friend”), derived from amāre(“to love”). Compare French ami, Italian amico, Portuguese amigo and Romanian amic. Doublet of amicus.

etymonline

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amigo (n.)

"friend, comrade," also a form of address, 1837, American English (first attested in the phrase adios, Amigo), from Spanish amigo, literally "friend," from Latin amicus "friend," related to amare "to love" (see Amy).