Bulgaria

Bulgaria, officially the Republic of Bulgaria is a country in southeastern Europe. It is bordered by Romania to the north, Serbia and Macedonia to the west, Greece and Turkey to the south, and the Black Sea to the east. With a territory of 110994 km2, Bulgaria is Europe's 14-th largest country.

HD Universe
"Eddie: Where are you from, pal of mine? What's your accent? Are you from East Europe? Romania? Bulgaria? Balkans? Niko: Hey, you're a smart guy."
 * At one point during their first random encounter, Eddie Low will ask Niko about his accent. During the conversation he asks if he's from Eastern Europe; mentioning Romania, Bulgaria and the Balkans:

- Eddie Low and Niko