Sir Frederick John Pollock, 4th Baronet (26 Dec 1878 – 22 July 1963) was an English historian, journalist and translator.

John Pollock was the son of Sir Frederick Pollock, 3rd Baronet and Georgina Harriet Deffell, younger daughter of John Deffell, of Calcutta.

[1] He was educated at Eton College, graduated in 1900, and continued his education at Trinity College, Cambridge (Bachelor of Arts, Fellow 1902,[2] Master of Arts 1904).

[3] From 1915 to 1919, John Pollock was in Poland and Russia as chief commissioner of the Great Britain to Poland and Galicia Fund under the Russian Red Cross.

[3][4] In 1920 he married famous Russian actress Lydia Borisovna Yavorskaya (Gubbenet / Hubbenet) (1874-1921), ex-wife of writer prince Vladimir Baryatinskiy.