Narayan Sanyal (Death: April 17, 2017) commonly known by his nom de guerre Bijoy da alias Naveen Prasad was a Maoist ideologue and senior Politburo member of the Communist Party of India (Maoist). Sanyal was one of the earliest comrade of Naxal leader Charu Majumdar and member of undivided Communist Party of India (Marxist–Leninist). It is believed that at the time of arrest Narayan Sanyal was next only to CPI (Maoist) general secretary Muppala Lakshmana Rao alias Ganapathy.
Sanyal was born in an affluent family in Bogra District of Bangladesh. His father was a district leader of Indian National Congress. The family of sanyal shifted to India in 1940s. After completion of the education he joined in a service of United Bank of India in Kolkata. In 1960s he left the job and participated in ultra left politics.
Sanyal was initially associated with the Man-Money-Gun group founded by Bengali revolutionary Ananta Singh, until the Naxalbari uprising erupted in 1967. In 1969 he went to Bihar and started working under Satyanarayan Singh, the then politburo member of CPI(ML). When almost the entire Bihar state committee defected under Singh’s leadership in 1971 over differences with Charu Majumdar ideology, Sanyal led pro-Majumdar unit of CPI(ML) in Bihar and organized members in the Jehanabad - Palamu belt. He was arrested in 1973 and was released in 1977 after the first Left Front government released political prisoners. In 1978, Sanyal along with others formed the group named CPI(ML) Party Unity. He became the general secretary of that group in 1987. This group was merged with CPI(ML)(People’s War) in 1998. While he was working in Bastar region in Chhattisgarh, played a pivotal role of merger with unified Communist Party of India (Marxist–Leninist) People's War and Maoist Communist Centre of India (MCC) in 2004. He also became politburo member of Communist Party of India (Maoist). Sanyal was also active in Palamu region of Jharkhand.