Okla. Stat. tit. 58, § 23
A petition for the probate of a will must show:
5. the name of the person for whom letters testamentary are prayed.
The petition for the probate of a will must be in writing and signed by the applicant or his counsel.
No defect of form, or in the statement of jurisdictional facts actually existing, shall make void the probate of a will.
R.L. 1910, § 6201; Amended by Laws 1963, SB 259, c. 102, § 1, emerg. eff. May 27, 1963.