Porsche

Kinda hard to say, VW and Porsche have kind of developed together after all. So finding any Porsche that has no influence from the cousin company is nearly impossible. Though the first car to carry the Porsche name badge is about as close as any other. So the type 64 is my guess

The 1948 Porsche 356 was the first production Porsche to come to market. Porsche used VW motors and suspension parts from the very beginning. The chasis and aluminum body were Porsche exclusive. Dr. Ing. Ferdinand Porsche Senior actually designed the VW Beetle well before Porsche was established. It wasn't until the late 1950's when Porsche started to engineer and manufacture more of thier own parts. Ferdinand Porsche Junior also independantly designed and built 3 race cars in 1939 called the Type 64, but then the war started and that got shot to hell (no punn intended).