Celeste

google

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late 19th century: from French céleste ‘heavenly’, from Latin caelestis, from caelum ‘heaven’.

wiktionary

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Borrowed from French céleste(“heavenly”), from Latin caelestis.

etymonline

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Celeste

fem. proper name, from French céleste (11c.) "sky, heaven," from Latin caelestis "heavenly" (see celestial).