The answer depends on what the witness has to say. It is important to consult with your attorney on which witnesses to bring to trial, as many parties are not familiar with the rules of evidence. For example, you might think a witness who witnessed your child saying something would add value to your trial, but that type of testimony would be excluded because it is hearsay. However, if a witness saw something happening to your child, then they would be a valuable witness. It is always a good idea to present all of your evidence, including witnesses, even if they might not be incredibly helpful. You never know what a judge is going to find convincing. It is also a good rule of thumb to send subpoenas to all potential witnesses, even the ones you are sure would show up at trial for you. Even the most loyal of witnesses can get cold feet when thinking about testifying about your divorce.