Many things change for a person who gets divorced: marital status, financial situation, and relationships with children to name a few. Another thing that might change is the person's last name. While in comparison to moving, having less time with kids, and having to divide most of your assets, changing a last name might not seem like a big deal, for many people actually faced with the situation, it is.
The right to name a child under age 18 belongs to the child's parents. If the parents cannot agree on the child's name, the court will decide based on the best interests of the child.