I'm not Dutch (but I do know two words of Dutch, no I can't repeat either of them in polite company -- there is a rather humorous story behind that but I digress), but the story of my name pretty much matches Jouke's.
I really like having a unique name that isn't too weird or too hard to spell for people over the phone. While my wife was pregnant, we worked hard on coming up with good names with this and other goals in mind.
We came up with several names that we really liked and even one set of such names that sounded good together. Unfortunately, the second set of names (yes, we needed two sets) was harder and so we eventually found the final name to complete the last set so that it sounded nice but didn't sweat as much as before on it having the right properties. Turns out it was the number one most common first name for boys born that year! Arghhh! I've named my son the modern equivalent of "John"! I'm so ashamed! ;)
(but most pronounce it "Ty")