Witty

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Old English wit(t)ig ‘having wisdom’ (see wit1, -y1).

wiktionary

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From Middle English witty, witti, from Old English wittiġ(“clever, wise”), equivalent to wit +‎ -y, See Norwegian Bokmål vettig.

etymonline

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witty (adj.)

Old English wittig "clever, wise, sagacious; in one's right mind;" see wit (n.) "intellect" + -y (2). Meaning "possessing sparkling wit" is recorded from 1580s. Related: Wittily; wittiness. Middle English had all-witty "omniscient" (c. 1400).