Moesi From Wikipedia, the free encyclopedia Jump to navigationJump to search For the cache coherency protocol, see MOESI protocol. The Moesi (/ˈmiːsaɪ/ or /ˈmiːzaɪ/; Greek: Μοισοί) was a Thracian tribe which inhabited present day Northern Bulgaria and Serbia, which gave its name to the Roman province of Moesia after its defeat in 29 BC.[1] Moesia was first established as a separate province in 4..