Nikolai Yakovlevich Marr (Russian: Никола́й Я́ковлевич Марр, Nikolay Yakovlevich Marr; Georgian: ნიკოლოზ იაკობის ძე მარი, Nikoloz Iak'obis dze Mari; 6 January 1865 [O.S. 25 December 1864] – 20 December 1934) was a Georgia-born historian and linguist who gained a reputation as a scholar of the Caucasus during the 1910s before embarking on his "Japhetic theory" on the origin of language (from 1924), now considered as pseudo-scientific,[1] and related speculative linguistic hypotheses.