Re: Dutch surnames (scatological warning!)

I know a guy called Rotman (Rotten/Very Unpleasant man), from the top
of my head.

Last names are really only used in formal settings, for most people
here at least. I have two friends named Peter, which I refer to as
Kleine Peter (Little Peter) and Voetbal Peter (Football (Association)
Peter) when I need to differentiate. I've got plenty of friends I
don't even know the last name of.