What is the name of Pepe le Pew's girlfriend?

Penelope Le Cat.

"Penelope Pussycat is best known as the often bewildered love interest of Looney Tunes' anthropomorphic skunk, Pepé Le Pew. Penelope is a typical black and white pussycat, though by some means or another, she often finds herself with a white stripe down her back, whether painted intentionally or (mostly) by accident."

https://en.wikipedia.org/wiki/Penelope_Pussycat

While Pepe Le Pew has chased just about anything that looks like a skunk (He has chased a male cat, a chihuahua, a wildcat, etc.) as well as the cat, who has been referred to as Penelope, Fifi, Fabrette, Felice, and often remains nameless. But the commonly accepted name, and the one used for marketing, is Penelope Cat.

Another link states: Pepé le Pew’s recalcitrant girlfriend, Kitty, is also especially famous and helped Chuck Jones create his own legend through Warner Bros.

https://en.wikipedia.org/wiki/Pepé_Le_Pew#Cameo_appearances