Okay, the first one may, just may have a distant family connection to a Porsche; the second one might even be made from recycled Porsche, but the third, the Saintly P 1800 one, is not at all to do with the same family.
However, you may be abe to claim Scottish
Rootes roots for the latter, because I remember seeing a trailer laden with unpainted P 1800 shells driving along near Linwood, Paisley... I only saw that once, because our local engineering unions must have seen it too, and quickly dealt with that piece of nonsense! Steel works indeed! What a cheek! We need revolution, not work!