Proper noun
Luga (a river in Russia)
Luga (a town in Leningrad Oblast, Russia). The town is placed on the river.
Source: en.wiktionary.orgOne of them is supposed to be Gorodets in the Luga region Lebedev 1982:225-238; Zalevskaia 1982:49-54 a fortification dated to the middle of the tenth century. Source: Internet