Amatu'l-Baha Ruhiyyih Khanum

Nee Mary Maxwell (1910-2000), also called Ruhyyih Rabbani; daughter of May Bolles Maxwell and Sutherland Maxwell of Montreal, Canada, and wife of Shoghi Effendi, the Guardian of the Baha’i Faith. She served as the Guardian's secretary during his lifetime. 

On 26 March 1952, succeeding her illustrious father, she was appointed a Hand of the Cause of God residing in the Holy Land. Ruhiyyih (meaning "spiritual") is a name given to her by Shoghl Effendi on their marriage. Khanum is a Persian title meaning "lady," "Madame," or "Mrs." The title Amatu’l-Baha (meaning "Maidservant of Bahá”) was used by the Guardian in a cable to a conference in Chicago in 1953. 

Rabbani is a surname given to Shoghi Effendi by 'Abdu'l-Baha After Shoghi Effendi's passing in 1957, she traveled extensively to teach the Baha'i Faith, consolidate Baha'i communities, and serve as a representative of the Universal House of Justice at major events.