There's a story (whose veracity I have not verified) that some of the stranger dutch surnames are because when some older occupying power (the spanish? Napoleon?) came in and immediately took a census, farmers gave in joke names, little thinking their descendants would still be known, and catalogued, by them.
It doesn't answer your question, but it relates another instance in which the dutch (at least supposedly) actively illegibilised themselves under the shadow of external data-gathering.
"En we noemen hem Robbert Gegevenstabeltje"