2 December] 1888 – 27 October 1937), better known under the adopted pseudonym of Firdevs, was a Crimean Tatar Bolshevik revolutionary and compatriot of Mirsaid Sultan-Galiev.

İsmail Kerim oğlu Kerimcanov was born in the city of Simferopol, in Crimea, into a family of merchants.

Beginning in January 1918, Firdevs took an active part in the takeover of the Crimean peninsula by communist forces.

Firdevs served as People's Commissar for Foreign and National Affairs within the Taurida Soviet Socialist Republic, and became Secretary of the Muskom in 1918.

Following the debate, Joseph Stalin condemned both, saying, "Ideologically, Firdevs is more likely to lead to Sultan-Galiev than vice versa.

"[4] From 1926 to 1929, Firdevs worked as an inspector to the North Caucasian Department of People's Education, based in Rostov-on-Don.

[1] After prolonged time at Solovki, Firdevs, Sultan-Galiev, and Deren-Ayırlı all condemned their previous political activities.