[kach22i]

I also found this.

The Jew who invented the Volkswagen
The Jew who invented the Volkswagen - The Canadian Jewish News

But undaunted, Ganz continued to send his ideas for a small, affordable car with independent suspension, swing axles, backbone chassis and a rear-mounted engine, to various manufacturers, particularly to the motorcycle companies who were keen to develop small cars.

Ganz was offered a consulting position with various companies including Adler and Daimler Benz. This allowed him to continue editing his critical magazine.
In 1931, he built a prototype at the Adler plant which he called the Maikafer, (German May Bug). With its pointed rear and its brown colour, it really did look like a bug. It was so light that one person could lift the front off the ground.

Maikäfer 'Volkswagen' prototype from 1931 by Josef Ganz at book presentation
https://www.youtube.com/watch?v=2-YZrJaOkF0

Uploaded on Oct 8, 2009
Starting the Maikäfer 'Volkswagen' prototype from 1931 by Josef Ganz at the book presentation of 'Het ware verhaal van de Kever: hoe Hitler het ontwerp van een joods genie confisqueerde' ('The true story of the Beetle: how Hitler confiscated the design of a Jewish genius') by author Paul Schilperoord - just before driving it on the race track during the Nationaal Oldtimer Festival in Zandvoort. For more information see: Josef Ganz – Father of the Beetle

So, we have some people saying Tatar and Ganz predate some of the Porsche/VW work.

I don't take a stance one way or the other, I just find all of it interesting.