List of Famous people who died at 77

Horst Schumann was an SS-Sturmbannführer (major) and medical doctor who conducted sterilization and castration experiments at Auschwitz and was particularly interested in the mass sterilization of Jews by means of X-rays.

Brian Leo Muller was a New Zealand rugby union player. A prop, Muller represented Taranaki at a provincial level, and was a member of the New Zealand national side, the All Blacks, from 1967 to 1971. He played 35 matches for the All Blacks including 14 internationals. He died on 12 December 2019 at the age of 77.

Imre Ráday was a Hungarian film actor.

Raymond de Saussure was a Swiss psychoanalyst, the first president of the European Psychoanalytical Federation.

Alexander Surtees Chancellor, CBE was a British journalist.

Prince Michael Petrović-Njegoš of Montenegro was the third son of Prince Mirko of Montenegro, Grand Voivode of Grahovo and Zeta (1879–1918), and Natalija Konstantinović, a cousin of Aleksandar Obrenović of Serbia. He was pretender to the throne of Montenegro, holding the title Grand Duke of Grahovo and Zeta, in succession to his father. King Nicholas I of Montenegro was Michael's grandfather. Michael had recognized and acknowledged the Unification of Montenegro with Serbia, renouncing the throne. In World War II he was held prisoner by the Nazis after refusing to take up the throne of the Axis forces' re-established Montenegrin puppet-state. During the period of Yugoslav socialism, he was an active member of the Serb diaspora revolutionary organization and a diplomatic worker against the socialist government led by Marshal Tito.

Terence Patrick Bourke, 10th Earl of Mayo spent much of his life in England, before moving to Ireland and finally France. He was a pilot in the Fleet Air Arm, ran a printing company, attempted to be elected as an MP in England, ran a marble quarrying company, and finally bred deer in south-west France.

Josep Franch Xargay was a Spanish professional footballer who played as a defender.