Baron Pyotr Karlovich Uslar (Russian: Пётр Карлович Услар, IPA: [ˈpʲɵtr kərɫəvʲɪt͡ɕ ʊsɫər]),[a] known by his German name Peter von Uslar (1 September [O.S.

9 July] 1875), was a Russian general, engineer and linguist of German descent, known for his research of languages and ethnography of peoples of Caucasus.

20 August] 1816 in Kurovo manor in Vyshnevolotsky District, Tver Governorate, Russian Empire.

[1][2] His grandfather was a native of Hanover who in 1765 moved to Russia and subsequently joined the ranks of Imperial Russian Army.

This appointment had eventually led to his interest in researching of Caucasian languages and to his tremendous contribution into the recording of numerous Caucasian languages from various linguistic groups, such as Abkhaz, Ubykh, Svan, Chechen, Avar, Lak, Tabasaran, Lezgian, Dargin, etc.