"Franz Heymann" wrote
Found this site which covers it well :
http://www.haarlemshuffle.com/expatzone/life/page2.html

I will have a look at it. In the meantime, it sounds as if it might
have affinities with what my friend in Holland once said the correct
form of addressing me in Holland would be, namely Zeer
HoochWeledelgeleerde Heer Professor Doktor Heymann
Franz

Yep :~))
Jenny