Meaning

noun United States diplomat and jurist who negotiated peace treaties with Britain and served as the first chief justice of the United States Supreme Court (1745-1829)

noun crested largely blue bird

originFrom Middle English jay, from Old French jai ("jay"; Modern French geai), either from Late Latin gaius (“jay”), or from Old French gai (“gay, merry”), so named due to its plumage, from Old Frankish *gāhi (“quick, impetuous”), from Proto-Germanic *ganhuz, *ganhwaz (“sudden”), cognate with Dutch gaai (“jay”). More at gay.

Etymology from Wiktionary, CC BY-SA 3.0