Larijan was the name of a district that encompassed the entire area covered by the Lar River in Mazandaran, a region on the Caspian coast of northern Iran. The mythical Iranian king Fereydun was said to have been born in a village in Larijan.
Sources
Book: Floor. Willem M.. Titles and Emoluments in Safavid Iran: A Third Manual of Safavid Administration, by Mirza Naqi Nasiri. 2008. Mage Publishers. Washington, DC. 978-1933823232.