The name 'Koh-i-Noor' (Mountain of Light) was given by Nadir Shah, the Persian ruler who invaded Delhi in 1739 and took possession of the diamond. Earlier it was known by various names including 'Samantik Mani' among Mughals. The name reflects its brilliance and value. Neither Jahangir, Ahmad Shah Abdali, nor Shah Jahan gave it this name.