(Lakk)
The Lak are the most southern group of Kurdish tribes in Iran. Some explain their name by the Persian word lak for "100,000," which is said to be the original number of Lak families. The Lak are sometimes confused with the Lurs, who they resemble physically but are distinguished from linguistically.
Although the Lak presently live in northern Luristan, they earlier emigrated from lands farther to the north. The Sharafnama mentions the Lak as a secondary group of Kurdish tribes who were subjects of Persia. The Lak currently adhere to the Ahl-i Haqq religion. The Lak are probably best known for producing Karim Khan and his Zand dynasty, which ruled much of Persia from 1751 to 1794.
Historical Dictionary of the Kurds. Michael M. Gunter.