A nephew in a dream mostly means your rebirth or renewal. You may be seeing some resemblance of your younger self in them, as you have grown older and wiser. They will teach you how to be a good uncle and a better version of you.
You might be feeling a sense of family or connection. A nephew in a dream could symbolize feelings of family or connection to others. If the nephew is happy and healthy in the dream, it could suggest that you are feeling connected and close to your family in your waking life. If the nephew is in trouble or distressed in the dream, it could suggest that you are feeling disconnected or distant from your family in your waking life.
Also, a dream about a nephew represents positive energy or blessings of family and teachings.