(1844-1921) Son of Bahá'u'lláh, designated His successor and authorized interpreter of His writings. Named `Abbás after His grandfather, `Abdu'l-Bahá was known to the general public as `Abbás Effendi. Bahá'u'lláh gave Him such titles as "the Most Great Branch," "the Mystery of God," and "the Master." After Bahá'u'lláh's passing, He chose the name `Abdu'l-Bahá, meaning "Servant of Bahá'u'lláh."

(AB-dol ba-HAW) (1844-1921): Son of the founder of the Bahá'í Faith and head of the Faith from 1892 to 1921. Author of some 27,000 writings (mostly letters) which Bahá'ís consider scripture; he is considered the infallible interpreter of his father's writings and a perfect example of how to live a Bahá'í life.

The "Servant of Bahá", 'Abbas Effendi (1844-1921), the eldest son and appointed Successor of Bahá'u'lláh, and the Centre of His Covenant.