Complete Dictionary of Dreams

by Dr. Mıchael Lennox
A niece is like the child you can walk away from, giving you a parental sensation without the responsibility.

If you have a niece in waking life, this dream is reflecting the quality of that individual as a character aspect of yourself. Such a dream is asking you to consider these qualities in your own life.

Ten Thousand Dream Interpretation

by Gustavus Hindman Miller
For a woman to dream of her niece, foretells she will have unexpected trials and much useless worry in the near future.

Mystic Dream Book

by Internet Archive - Anonymous
Mutual affection and assistance between you and a relation.