Then she keeps her maiden name. It is tradition and not compulsory to change it in most jurisdictions.
Cleopatra's maiden name was Cleopatra. Ancient women did not change their names upon marriage.
If "AB" was her last name before she married, then "AB" is her maiden name.
Changing your name is not a requirement, and will not void the marriage if the wife decides to keep her maiden name. Likewise, a name change alone will not formalize the marriage and the couple must still meet the requirements of their state.
Everyone has a Surname (last name), but only a married woman will have a Maiden name (surname prior to marriage)
Her surname before marriage.
Anna Maria Mozart, maiden name Pertl.
Take your marriage licence with you.
Ms.
'Maiden name' is used to refer to a married woman's surname prior to her taking her husband's name at marriage. If Jane White married William Sullivan and became Jane Sullivan, White would be her maiden name.
A married name is the family name adopted by a person upon marriage, and in speaking of the many cultures where the practice is traditional for women, the maiden name is the family name that the married name replaces.
She never was married. Keller is her only (maiden) last name.
Until the late 20th Century, it was the universal custom among speakers of the English language that upon marriage the woman would take the surname of her husband. The surname she had used before marriage, usually her father's surname, is called her maiden name, because it was the name she used when she was a maiden.