"of or related to Orpheus or the doctrines attributed to him," 1670s, from Latinized form of Greek orphikos "pertaining to Orpheus," the legendary master musician of ancient Thrace, son of Eagrus and Calliope, husband of Eurydice, who had the power of charming all living things and inanimate objects with his lyre. His name is of unknown origin. In later times he was accounted a philosopher and adept in secret knowledge, and various mystic doctrines were associated with his name, whence Orphic mysteries, etc. (late 17c.). The earlier adjective was Orphean (1590s). Related: Orphism.
late 14c., "an overflowing of water, a great flood, Noah's Flood in Genesis," from Old French deluge (12c.), earlier deluve, from Latin diluvium "flood, inundation," from diluere "wash away," from dis- "away" (see dis-) + -luere, combining form of lavere "to wash" (from PIE root *leue- "to wash"). Figurative sense of "anything that overflows or floods" is from early 15c.
After me the deluge (F. après moi le déluge), a saying ascribed to Louis XV, who expressed thus his indifference to the results of his policy of selfish and reckless extravagance, and perhaps his apprehension of coming disaster. [Century Dictionary]
Florentine statesman and author (1469-1527); see Machiavellian. His name was Englished 16c.-18c. as Machiavel.