Sergeyevna
Sergeyevna is a feminine patronymic used in Russian and several other Slavic naming traditions. It is formed from the male given name Sergey (Sergei) by adding the suffix -yevna, meaning "daughter of Sergey." The corresponding masculine form is Sergeyevich.
Sergeyevna is typically used as a middle name in formal full names, appearing after the first given
In everyday speech, people usually refer to others by their first name or first name plus patronymic