The name "Kruk" originates from the name of a well-known bird—the raven—which can also denote a crow in a different context. In our catalog, the name "Kruk" itself is not recorded, but there is a well-known derived surname formed with the patronymic suffix -enko. For example, in the Cossack regiment of Kalnytsky in 1649, Vasyl Kruchenko is mentioned. Today, the surname "Kruk" is known in seven regions of Ukraine.