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Arbayistan was a Sassanid Persian satrapy in Late Antiquity, which reached across Upper Mesopotamia toward the Khabur river and north to the lower districts of Armenia.
Sayce identified Shinar as cognate with the following names: Sangara/Sangar mentioned in the context of the Asiatic conquests of Thutmose III (15th century BCE); Sanhar/Sankhar of the Amarna letters (14th century BCE); the Greeks's Singara; and modern Sinjar, in Upper Mesopotamia, near the Khabur River.
The history of upper Mesopotamia in this period is documented in the archives of Mari, Syria.
The family name of Sassoon, is also commonly shared by many Armenian and Kurdish families and tribes who all originate from the mountainous district of Sason (whence the family and tribal names), west of Lake Van, in upper Mesopotamia, in modern Turkey.