Padayatt Kesavapillai Vasudevan Nair, popularly known as PKV, was an Indian politician and lawyer who served as the 7th Chief Minister of Kerala from 1978 to 1979. He was a Member of the Lok Sabha from 1957 to 1971 and again from 2004 until his death in 2005. He became Chief Minister on 20 October 1978, following A. K. Antony's resignation as Chief Minister. However he resigned on 7 October 1979 owing to differences with other parties in the United Front. He served in the Kerala Legislative Assembly from 1977 to 1982. Nair was a senior member of the Communist Party of India

Alappuzha State assembly constituency is one of the 140 state legislative assembly constituencies at the state Kerala in southern India. It is also one of the 7 state legislative assembly constituencies included in the Alappuzha Lok Sabha constituency. The current MLA is P. P Chitharenjan of CPI(M).