If dreamed you that you decided to change a surname, then in real life you feel the need for changes. It is possible that in the near future you will change work or will make changes to private life. If in a dream you hear that someone calls you by last name, then, perhaps, soon your acquaintances will ask you for the help. If the woman feels grief because she accepted a surname of the husband, means in reality she is not quite happy how there is family life.
Be sure and keep any other thoughts out of your mind before drifting to sleep as a cluttered mind can decrease the chances that you will remember your dreams upon waking. Also, focusing on remembering your dreams upon waking in the morning is another very important thing. This sounds very easy, but is often hard for some to do. Interpret a dream by "dictionary dream of interpretation"
When you very first wake up, simply think about your dreams. Don't allow your mind to drift off to other things, just lay there and think about the things you dreamt about the night before - dictionary dream meaning.