Capitalisation
The prefix von is not capitalized in German-speaking countries, unless it begins a sentence – for instance, "A book by von Humboldt", but "Von Humboldt wrote this book." Abbreviated v. is uncapitalized even if it does begin a sentence ("v. Humbolt wrote this book.")
For capitalisation in Dutch and Flemish usage, see Van (Dutch).
Read more about this topic: Von