The Kerala Legislature's list of Chief Ministers opens with E.M.S. Namboodiripad and records four separate terms for K. Karunakaran

Background

The Kerala Legislature maintains an official list of the Chief Ministers of Kerala with their tenures.
The list opens with Shri E.M.S. Namboodiripad, whose tenure ran from April 5, 1957 to July 31, 1959.
Shri Pattom A. Thanu Pillai follows, from February 22, 1960 to September 26, 1962, and then Shri R. Sankar, from September 26, 1962 to September 10, 1964.
Shri E.M.S. Namboodiripad returned for a second tenure from March 6, 1967 to November 1, 1969.
Shri C. Achutha Menon appears twice on the list, with tenures from November 1, 1969 to August 1, 1970 and from October 4, 1970 to March 25, 1977.
The list records four separate tenures for Shri K. Karunakaran and three each for Shri A.K. Antony and Shri E.K. Nayanar.
Shri P.K. Vasudevan Nair and Shri C.H. Mohammed Koya each held office once, in tenures recorded in the late 1970s.
The Legislature keeps separate lists for Governors, Speakers, Deputy Speakers and periods of President's Rule.