Poonthottam Achhan Nambudiri (also known as Poonthottam Parameshwaran Nambudiri) (1821-1865) was a poet of the Venmani School of Malayalam Literature. Nambudiri was born in 1821 in Killikkurussimangalam, Palakkad district. He was a close friend and associate of Venmani Achhan Nambudiripad from Kodungalloor. Nambudiri was a talented poet whose works include Ambareesha Charitham (Ottan Thullal), Kaalakeya Vadham , Syamanthakam and a few Muktakams. His son Damodaran Nambudiri was also a poet and was known as Poonthottam Mahan Nambudiri.