from The American Heritage® Dictionary of the English Language, 5th Edition.
- A city of southern Moldova on the Dniester River northwest of Odessa, Ukraine. A historically strategic gateway to Bessarabia, the city has been controlled at various times by Turkey, Russia, Romania, and the Soviet Union. Transnistria assumed control of Tighina in 1992.
Sorry, no etymologies found.
(I have never been to Tighina/Bendery, but it is another interesting if lesser-known example which actually fits the geography of the novel rather well.)