Personal pronouns (words like me, you, him, her, us, them) also have to be in the accusative after dative prepositions:
What do these phrases mean?
If a German surname contains the word von, it indicates that the family originally belonged to the nobility.
Some well-known people whose surnames contain the word von are Johann Wolfgang von Goethe (German playwright and poet), Alexander von Humboldt (German geographer, naturalist and philosopher) and Franz von Suppe (Austrian composer).
Since the abolition of the monarchy in Germany and Austria in 1919, there are no longer any privileges attached to having von in your surname and names are listed by the main name, so H for Humboldt, rather than V for von.
In the Middle Ages and early modern times, von could also indicate where people came from, for example Peter von Köln - Peter from Cologne.
Nowadays people use the preposition aus and say ich komme aus Köln - I come from Cologne - or ich komme aus der Schweiz - I come from Switzerland.