Who invented VW beetle?

After doing research I've found that it was both Béla Barényi and Ferdinand Porsche. who ever truly invented it i dont know but it seems to be an acumulation of ideas from Barényi and Porsche. As far as i know Hitler asked Porsche to design a car that would carry 2 adults and 3 children. there were a few other requirements but Porsche supposedly designed the first Volkswagen Beetle. Hitler didn't invent it if anyone wanted to know.