1971, Peter Kenez, Civil War in South Russia, 1918: The First Year of the Volunteer Army, University of California Press:
...ex-Imperial officers who came to the Don and the Kuban to take arms against Lenins regime...
1984, Tamara Dragadze, Social Science:
"In the 1860s, the lands beyond the Kuban were settled by Black Sea and Line Cossacks from areas populated earlier..."
(by extension) a geographic region of Southern Russia surrounding the Kuban River, on the Black Sea between the DonSteppe, Volga delta and the Caucasus.
1954, United American Ukrainian Organizations Committee of New York
"In the south, the Red Army abandoned Krasnodar and all of the Kuban. Nazi forces plunged south into the Caucasian highlands and east to Stalingrad."
2002, James Minahan, Encyclopedia of the Stateless Nations:
"In 1995, the administration of the Krasnodar Territory, again popularly called the Kuban, adopted the flag of the Kuban Cossacks, with the addition of the territorial coat of arms."
Usage notes
Although Krasnodar Krai is often referred to as Kuban, both officially and unofficially, the term is not exclusive to the krai and accommodates the republics of Adygea, Karachay-Cherkessia and parts of Stavropol Krai.
According to the 2010 United States Census, Kuban is the 39352nd most common surname in the United States, belonging to 559 individuals. Kuban is most common among White (95.17%) individuals.