Scholars have different ways of breaking down the different periods of Aramaic. Fr. Joseph Fitzmyer, for instance, proposes that Aramaic passed through five phases:
Old Aramaic (ca. 925 to 700 BC): Attested by numerous small inscriptions and fragments of three
Sefire steles.
Official Aramaic, aka Imperial or Standard Aramaic (700 to 200 BC): The official language and
lingua franca of the Achaemenid Empire. Attested in several places in Egypt (including Elephantine), in Arabia and Palestine, as well as Syria, Assyria and Babylonia, but even in the Indus Valley. Also the language of the
Elephantine papyri and
Biblical (OT) Aramaic, specifically the book of Ezra (4:8-6:18; 7:12-26).
Middle Aramaic (200 BC-AD 200): Attestations include the Dead Sea scrolls from
Khirbet Qumran and the documents from
Wadi Muraba’at, both in the Judaean desert. This phase includes the emergence of real local dialects, including the dialects of Palestine and Arabia (Nabatean, Qumran, Murabba’at etc.), and Syria and Mesopotamia (Palmyra, Edessa and Hatra).
Late Aramaic (AD 200-700): He proposes two large geographical subdivisions: Western (Jewish Palestinian Aramaic, Samaritan Aramaic and Christian Syro-Palestinian Aramaic), and Eastern (Syriac, Jewish Babylonian Aramaic and Mandaic).
Modern Aramaic (AD 700-present): With many modern (Neo-Aramaic) dialects.
Klaus Beyer, on the other hand, has a different scheme:
1.) Old Aramaic
- *]Ancient Aramaic (11th century BC-ca. 500 BC)
*]Imperial Aramaic (ca. 500 BC-ca. AD 200): May be divided into various dialects beginning in the 2nd century BC.
*]Old Eastern Aramaic and Old Western Aramaic: Largely contemporaneous with Imperial Aramaic, but not used for official documents.
2.) Middle Aramaic (AD 200-medieval period)
- *]Eastern Middle Aramaic
*]Western Middle Aramaic
3.) Modern Aramaic
- *]Modern Eastern Aramaic
*]Modern Western Aramaic
*]Modern Mandaic