Kaithapram Vishwanathan Nambudiri (also spelled Namboothiri) is an Indian musician and music director from Kerala, India. He has directed songs in Malayalam movies. His brother, Kaithapram Damodaran Namboothiri, is a lyricist and a poet.
An alumnus of Thiruvananthapuram Music College, Nambudiri handled the orchestra for his brother's songs in Jayaraj's Desadanam. He made his debut with Kaliyattam, directed by Jayaraj. Since then he has done music for about 20 films, many of which were directed by Jayaraj including Kannaki and Thilakkam. His scores had been rendered by K.J. Yesudas, Jayachandran, K.S. Chithra and G. Venugopal.