Knothead and Splinter are the nephew and niece of which cartoon character?

Wooddrow "Woody "Woodpecker is an animated cartoon character, an anthropomorphic woodpecker who appeared in theatrical short movies produced by Walter Lantz, and distributed by Universal Pictures.

"Woody Woodpecker" cartoon was created in 1940 by Ben "Bugs" Hardaway. He also created the cartoon characters of Bugs Bunny and Daffy Duck when he worked at the Schlesinger/Warner Bros. studio in the late 1930s.

His niece and nephew are Knothead and Splinter. His girlfriend is Winnie Woodpecker. In "The New Woody Woodpecker Show", Winnie is voiced by B. J. Ward.

Knothead and Splinter first appeared in the cartoon "Get Lost!". Originally Knothead and Splinter were Woody's nephews in the "New Funnies" comic books. Knothead was Nuthead and Splinter was a boy. But in 1949, Nuthead was turned into Knothead and Splinter was a girl. In the late 1950's Knothead and Splinter appeared in both animated cartoons and comic books. They were both voiced by June Foray. Woody was voiced by Grace Stafford/Lantz/Lanza. Knothead and Splinter had rivals such as Heckle and Jeckle, Chip N' Dale and the Goofy Gophers during their time. They also appeared in "The New Woody Woodpecker Show".