Who is the original catgirl?

I'm curious, could you enlighten me on the origins of the term 'catgirl'? Who is the pioneering figure that first introduced this concept into the realm of popular culture? Is there a specific artist, character, or event that stands as the definitive starting point for this fascinating fusion of feline charm and humanoid form? I'm intrigued to learn more about the backstory behind this iconic and often beloved archetype in the world of anime, manga, and beyond.