S͟hayk͟h Káẓim-i-Samandar (Persian: کاظم سمندر; died 1918), known as Samandar, was an eminent follower of Baháʼu'lláh, the founder of the Baháʼí Faith.
Samandar was of a wealthy mercantile family, and Shaykh Muhammad Qazvini had made a success of the business.
Samandar was living in Qazvin when a group of very active Azalis begun disputing Baháʼu'lláh and his claims.
He subsequently became a staunch believer in Baháʼu'lláh, and wrote a pamphlet denouncing the Azali's and stating they based their claims on nothing.
Baháʼu'lláh then renamed Muhammad Kázim Qazvíní as Samandar a Persian word meaning phoenix.
In Acre Samandar's daughter Thurayyá Khánum was married to Baháʼu'lláh's younger son Mírzá Ḍíyáʼu'lláh.