Pit Suetterlin via openSUSE Users wrote:

Per Jessen wrote:

Butbut, they _are_ 1-part last names?  Leeuwen, Donato ?

That's not last name, that's last part of the last name  :D

Hehe :-) 

Way off-topic of course, but it is Friday. 

Maybe it is just me, but I usually don't consider the "van", 
"von", "zu", "di", "auf", "van den", "in der", "auf der" to be a part of
the last name.  It is an old indication of nobility, even if not in
much use any more. 

https://en.wikipedia.org/wiki/Nobiliary_particle

Or "de la Guardia".