Quick answer
Changing a child’s name is a separate legal issue; divorce or a parent’s name change does not automatically change it.
Do now
Gather the birth record, legal-parent information, custody order, and the reasons for the proposed change. Ask about notice, consent, and court requirements in the appropriate jurisdiction. Explain safety concerns through a confidential legal channel.
Watch for
Updating a school nickname or online profile does not change the legal name. Do not conceal a parent whose notice rights need to be addressed.
Official sources
NJ Courts — Representing Yourself, NY Courts — Family Issues and Divorce, DC Courts — Family Court Self-Help Center.
