Nilambur Kovilakam, also known as the Nilambur Kingdom, was a former vassal kingdom and royal Kovilakam situated in Nilambur, in present-day Kerala, India, near the Nilgiri range of the Western Ghats. It was ruled by Samantha Kshatriyas of the Nagavanshi clan who were the family members, relatives and representatives of the Samoothiri Raja (Zamorin) of Calicut, and served as the Naduvazhi and the Jenmimar (aristocracy) of Nilambur. The Nilambur kings extended their power and authority by marrying with the Nambudiris. This practise was called Sambandam, and resulted in both Brahmins and Kshatriyas taking turns to rule over the Nilambur Kovilakam kingdom. The Brahmin rulers used the title Namboodiripād, while the Kshatriya rulers used the title Thirumulpād. To seal this marriage alliance, they jointly built several aristocratic Illams, such as the Nambudiri stronghold of Pootheri Illam in Feroke.