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

Loved all the cartoons listed as a small child!

Awesome cartoon.I figured the answer by their names.

June Foray also did Rocky the Flying Squirrel

i mean, i don't exactly watch "woody woodpecker" i just kinda examined the names. Its kinda obvious with the name "Splinter" and "Knothead"