I want to thank you for that interesting piece of Etymology:)
I've always heard I have what you would call "Black Dutch" ((not to be racial, but it's not like a black person Dutch. There was a time when someone set the Dutch villages on fire, and they had to travel to find another place to live, and they were smothered with ashes so they were called Black Dutch, or Blue-Belly Dutch)).
And
Gilbert is also a Dutch usage. :)