Who did first use the concept of "supremum"?

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Is there one specific person, who first defined the concept of "supremum"? If so: In which work?

In my textbooks or by a quick search on the internet, I did not find an answer to my question.

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Maybe it was first defined by Bolzano in 1817, in Reinanalytischer Beweisdes Lehrsatzes, dass zwischenjezweiWerthen, die ein entgegengesetztes Resultat gewähren, wenigstens eine reelle Wurzel der Gleichung liege, see Wanner, Hairer - Analysis by its history, p. 182.

also in page 175 of A History of Analysis, edited by Hans Niels Jahnke. – lhf