"The Guardian of the Cause of God," 2.

"The Hands of the Cause of God," and 3.

"The Houses of Justice, Local, National and International."(44) The Guardian of the Cause of God 'Abdu'l-Baha appointed His eldest grandson, Shoghi Effendi, to the responsible position of "Guardian of the Cause" (Valiyy-i-Amru'llah).
Shoghi Effendi is the eldest son of Diya'iyyih _Kh_anum, the eldest daughter of 'Abdu'l-Baha.

His father, Mirza Hadi, is a relative of the Bab (although not a direct descendant, as the Bab's only child died in infancy).

Shoghi Effendi was twenty-five years of age, and was studying at Balliol College, Oxford, at the time of his grandfather's passing.