Shaykh Káẓim-i-Samandar (Persian: كاظم السمندر ; died 1918), known as Samandar, was an eminent follower of Bahá'u'lláh, the founder of the Bahá'í Faith. He was born to a prominent Bahá'í family of Qazvin of Bábí and Shaykhi background. Favored by Bahá'u'lláh, he was identified as one of his nineteen Apostles.
Samandar was born Muhammad Kázim Qazvíní in February 1844 in Qazvin, the eldest surviving son of Shaykh Muhammad Qazvíní. Shaykh Muhammad was an early Bábí and later Bahá’í. His father was bastioned in Qazvín and attained the presence of the Báb who was then imprisoned in Máh-Kú. Later Shaykh Muhammad was entitled Nabil by Bahá’u’lláh. He was named after Siyyid Kázim whom his family had close connections with. His mother was a disciple of Táhirih. Samandar was of a wealthy mercantile family, and Shaykh Muhammad Qazvini had made a success of the business. From an early age he was a devout Bahá’í, and clearly remembered the days of persecution as a little boy.
Samandar was living in Qazvin when a group of very active Azali’s begun disputing Bahá’u’lláh and his claims. Samandar studied the writings of both Azali and Bahá’u’lláh. He subsequently became a staunch believer in Bahá’u’lláh, and wrote a pamphlet denouncing the Azali’s and stating they based their claims on nothing. The document was read widely, and reduced influence of the Azali's in Qazvin.