A mother’s maiden name refers to the surname a woman had before getting married. It is typically the family name she was given at birth.
This name becomes her last name before changing it to her husband’s surname.

Credit: quotefancy.com
What Is A Mother’s Maiden Name?
A mother’s maiden name refers to her surname before she got married and changed her last name to her husband’s. It is often used as a security question for identification purposes.
However, there are debates regarding the effectiveness of using mother’s maiden names as a security measure, as this information can often be easily obtained or guessed. Therefore, it is important to consider additional layers of security to ensure the protection of personal information.