Okla. Stat. tit. 12, § 1637
After the effective date of this act, no natural person in this state may change his or her name except as provided in Sections 1631 through 1635 of this title and Sections 1 and 3 of this act, other than by marriage or decree of divorce or by adoption.
Laws 1953, SB 149, p. 57, § 7, emerg. eff. May 19, 1953; Amended by Laws 1986, SB 425, c. 82, § 2, emerg. eff. April 3, 1986.