Jacob Albertus Marais (2 November 1922 – 8 August 2000) was an Afrikaner nationalist thinker, author, politician, Member of Parliament, and leader of the Herstigte Nasionale Party (HNP) from 1977 to his death in 2000. Marais is the longest serving head of any political party in Afrikaner history, with a term of 23 years.