Siyyid Mírzá 'Alí-Muhammad (1819-1850), was a merchant from Shiraz, Persia, who at the age of 25, claimed to be a new and independent Manifestation of God, and the promised Qá'im, or Mihdi. After his declaration he took on the title of the Báb meaning "Gate" in Arabic. He founded the Bábí Faith and is regarded by Bahá'ís as the herald of Bahá'u'lláh.
Mírzá Husayn-'Alí (1817-1892), who later took the title of Bahá'u'lláh ("The Glory of God" in Arabic) was the founder-prophet of the Bahá'í Faith. Bahá'u'lláh claimed to fulfill the Bábí prophecy of "He whom God shall make manifest", but in a broader sense he also claimed to be the Messenger of God prophesized in all great religious traditions.
Sir 'Abdu’l-Bahá Abbas Effendi (May 23, 1844 - November 28, 1921) commonly known as 'Abdu’l-Bahá, was the son of Bahá'u'lláh. 'Abdu'l-Bahá was appointed by his Father to succeed him, and became leader of the Bahá'í Faith in 1892.
Shoghi Effendi Rabbani was the Guardian of the Bahá'í Faith from 1921 to his death in 1957. He was the eldest grandson of 'Abdu'l-Bahá.