It's really difficult to identify wood types when you have them in front of you, even harder from photos. The second one looks like a crown cut walnut to me but it's hard to tell the colour from the photo. However, walnut veneer doesn't usually have sapwood but sometimes it does, again making this really hard! It could also be elm, which I think would be useful to you. I've recently made a blade with an elm outer and, theoretically, it has suitable properties, I haven't tested it yet though. Elm tends to be less golden brown though.
The last one is definitely a mahogany of some sort, however which one? It could be khaya (African mahogany), I would want it to be a true mahogany as that's softer and lighter. I would go off the weight as much as anything as identifying through appearance is really difficult. Although the g/cm3 makes sense I don't measure that way, I measure the weight of a 28 x 16cm sheet. So for example a true south American Mahogany at 0.6mm will be (approx) 15g, limba 14g, koto 15g, ayous 12-13g, walnut 16g, ash 17g etc. However, this can vary depending on the moisture level/age. Based on its properties I would expect khaya to be 16 - 17g.
Wood 4 - cerejeira? It looks like an oak of some sort.
Wood 6 - lacewood? Although the weight suggests something heavier. Leopardwood? Although your's looks too golden.
As for the others, hard to say, they are not woods i'm familiar with. Good luck!