EEEEEK!!!!! A real Dutch person! (...)
Haha, no worries
It's such a small country, so I can't really blame you for not knowing much about it XD
Honestly I don't even know that much about it myself. History classes were always so boring...
About the name 'Abigale'. Well, not to disappoint you or anything, but it really isn't very Dutch. It's more English.
It's because we pronounce the 'g' in a completely different way. Much, uhm.. harder?
Here's a link to a very good Dutch song with lyrics. This way you'll hear how our 'g' is pronounced ^^
http://www.youtube.com/watch?v=_4ddL85RtB0
You don't need to listen to the whole thing. The first 3-4 sentences use the 'g' 3 times

Also, the 'ch' is also pronounced as our 'g' most of the time (in this song especially).
But as I mentioned before, it's no big deal. I doubt anyone besides actual Hollanders will notice. Besides, there are a lot of English, French and Spanish sounding names here. So, yeah. You can get away with it. Same goes for Byron and Duncan...
Quick tip: We hardly ever use the letter 'y' in our words ^^" So that includes our names, I'm afraid.
As for some Dutch names, I'll send you a pm. I know quite a few (obviously XD) so it became a reasonably large list.
Feel free to use, or ignore it as you see fit ^^