Jett is derived from the English word "jet," referring to the black gemstone or the dark color, with roots in Old French "jaiet" and ultimately from Greek "gagates." The name gained modern popularity in English-speaking countries, particularly in the United States, with no specific religious affiliation, though it has been used across various Western cultures.
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Baby name data from babynamesuggestion.com. Popularity figures are Australian registry data and remain subject to the originating agencies' terms.