Names are a pretty big deal. I don't want to put to fine a point on it, but don't tell other people what their name is.
This happened to me last year but I still think about it some times, it really bugged me. If you can't pronounce someone's name, thats ok, your only human, but try, try to learn how to say it. don't shorten it,
ITS NOT YOUR NAME TO CHANGE.
If someone gets married and keeps their name or changes it, don't worry about it
ITS NOT YOUR NAME
If someone's first name changes and they ask you to use a new name, use the new name.
ITS THEIR NAME
sorry this has been coming up a bit lately, just call people by their name. thats like the bace line of human decency.