This is tough! First, I like Vaughn.
For the girls, I love Norah. Also, I love Violet. I seriously am having trouble deciding which I like more! I think I will give the slight nudge to Norah, but they are both really lovely names, so whichever you decide will be great! Dale works too for the mn. I don't think many people would get the Violet Dale thing (I know I wouldn't have!) and even if they do, that's okay too since it has meaning for you.