Wikipedia has a page called:

Samarkand (known as "Marakanda" in Greek) is the Mongolian capital in Sid Meier's Civilization and a Persian city or city-state in other Civilization games. In real life, it is a city in present-day Uzbekistan.

Civilization VEdit

Main article: Samarkand (Civ5)

Samarakand appears as a city-state.

Civilization VIEdit

Main article: Marakanda (Civ6)

Marakanda appears as a city-state in the Conquests of Alexander scenario.