Okla. Stat. tit. 10, § 10-90.4: Children born out of wedlock - Change of name

A. At any time after a determination of paternity, the mother,

father, custodian or guardian of the child may file a motion

requesting the court to order that the surname of the child be

changed to the surname of its father. The court shall thereafter

set a hearing on said motion. Notice of the filing of the motion

and the date of the hearing shall be served by process on all

parties.

B. If, after said hearing, the judge finds that it is in the

best interest of the child to bear the paternal surname, the court

shall enter an order to that effect which shall include findings of

fact as to each issue raised by the parties.

C. The practice, pleading, and proceedings as set forth in this

section shall conform to the applicable rules prescribed by the Code

of Civil Procedure.