Cal. Code of Civil Procedure § 1278

(a) (1) Except as provided in subdivisions (c) and (d), the petition or application shall be heard at the time designated by the court, only if objections are filed by a person who can, in those objections, show to the court good cause against the change of name. At the hearing, the court may examine on oath any of the petitioners, remonstrants, or other persons touching the petition or application, and may make an order changing the name, or dismissing the petition or application, as the court may deem right and proper. (2) If no objection is filed at least two court days before the date set for hearing, the court may, without hearing, enter the order that the change of name is granted. (b) If the provisions of subdivision (b) of Section 1277 apply, the court shall not disclose the proposed name unless the court finds by clear and convincing evidence that the allegations of domestic violence, stalking, or sexual assault in the petition are false. (c) If the application for a change of name is brought as part of an action under the Uniform Parentage Act (Part 3 (commencing with Section 7600) of Division 12 of the Family Code), the hearing on the issue of the change of name shall be conducted pursuant to statutes and rules of court governing those proceedings, whether the hearing is conducted upon an order to show cause or upon trial. (d) If the petition for a change of name is filed by a guardian on behalf of a minor ward, the court shall first find that the ward is likely to remain in the guardian’s care until the age of majority and that the ward is not likely to be returned to the custody of the parents. Upon making those findings, the court shall consider the petition and may grant the petition only if it finds that the proposed name change is in the best interest of the child. (e) This section shall become operative on September 1, 2018.