Lezgins or Leks (Лезгияр, Лекьер. lezgijar) are a Northeast Caucasian ethnic group native predominantly to southern Dagestan, a republic of Russia, and northeastern Azerbaijan, and speak the Lezgin language. Their social structure is firmly based on equality and deference to individuality. Lezgin society is structured around djamaat (жамаат- unions of clans) and has traditionally been egalitarian and organised around many autonomous local clans, called syhils (сихилар).
The land of the Lezgins has been subject to multiple invaders throughout history. Its isolated terrain and the strategic value outsiders have placed on the areas settled by Lezgins has contributed much to the Lezgin community ethos and helped shape its national character. Due to constant attacks from the invaders, the Lezgins have developed a national code of honor and conduct, Lezgiwal, passed down from generation to generation by parents and society. It implies moral and ethical behaviour, generosity and the will to safeguard the honor of women.
The eagle being the Lezgin national animal, the term Lezgi is said to derive from Lek, the Lezgin word for eagle. Others believe Lezgi to be derived from the ancient Legi and early medieval Lakzi.
Ancient Greek historians, including Herodotus, Strabo, and Pliny the Elder, referred to the Legoi (or Lē̂chai) people who inhabited Caucasian Albania.
Arab historians of the 9th and 10th centuries mentioned a kingdom called Lakz, in present-day southern Dagestan. Al Masoudi referred to inhabitants of this area as Lakzams (Lezgins), who defended Shirvan against invaders from the north.
Prior to the Russian Revolution, "Lezgin" was a term applied to all ethnic groups inhabiting the present-day Russian Republic of Dagestan. In the 19th century, the term was used more broadly for all ethnic groups speaking non-Nakh Northeast Caucasian languages, including Caucasian Avars, Laks, and many others (although the Vainakh peoples, who were Northeast Caucasian language speakers were referred to as "Circassians").