Commas around names
Wrong: Where do you want to go James?
Right: Where do you want to go, James?
Wrong: So Mary what do you propose?
Right: So, Mary, what do you propose?
In dialog, when one character speaks to another and refers to him or her by name, always set off the name with a comma before the name, and—if another clause follows—one after the name.
Capitalizing proper names
Wrong: de Broux is a wonderful fellow.
Right: De Broux is a wonderful fellow.
Right: Patrick de Broux is a wonderful fellow.
Many surnames begin with de, di, da, von, van and other lower-case prefixes. Although the correct spelling of Wernher von Braun is with a lower-case v, when beginning a sentence with the surname, always capitalize the prefix (as in “Von Braun became director of NASA's Marshall Space Flight Center in 1960.”).