No it's an adjective. Adverbs modify verbs.
Wittily
The noun wit has the adjective form witty and the adverb for wittily (in a witty fashion).(The related adjective witting has the adverb wittingly, meaning intentionally.)
Yes, witty is an adjective--a witty person.
The suffix for witty is -y.
Nate Witty's birth name is Nathaniel Harbour Witty.
For cleverness, it's witty.
Tagalog Translation of WITTY: matalino
John Witty's birth name is Rupert John Blanchflower Featherstone-Witty.
Nate Witty is 6' 1".
George Witty died in 1941.
George Witty was born in 1856.
The Witty Sorcerer was created in 1931.