Where does “Nam Ossetia” come from?

Nam Ossetia (Vietnamese) comes from English Ossetia, from Russian Осе́тия, from Georgian ოსეთი, from Georgian ოსი, from Old Georgian ოვსი — Ossetian.

Ancestry of “Nam Ossetia”, step by step

Nam Ossetia traces back through two separate lines of ancestry.

via English Ossetia

StepLanguageWordMeaning
1EnglishOssetiaThe northern part of the region forms North Ossetia-Alania federal subject of Russia. The southern part is South Ossetia
2RussianОсе́тия
3GeorgianოსეთიOssetia
4GeorgianოსიOssetian
5Old GeorgianოვსიOssetian

via Vietnamese năm

StepLanguageWordMeaning
1Vietnamesenămfive; a year
2Proto-Chamic*namsix
3Proto-Malayo-Polynesianənəmsix
4Proto-Austronesianənəmsix
5Proto-Austroasiatic*ənəm
Every word from Old Georgian ოვსიEvery word from Georgian ოსიEvery word from Georgian ოსეთი