Septuagint (sometimes abbreviated LXX) is the name given to the Greek translation of the Jewish Scriptures. The Septuagint has its origin in Alexandria, Egypt and was translated between 300-200 BC. Widely used among Hellenistic Jews, this Greek translation was produced because many Jews spread throughout the empire were beginning to lose their Hebrew language. The process of translating the Hebrew to Greek also gave many non-Jews a glimpse into Judaism. According to an ancient document called the Letter of Aristeas, it is believed that 70 to 72 Jewish scholars were commissioned during the reign of Ptolemy Philadelphus to carry out the task of translation. The term Septuagint means seventy in Latin, and the text is so named to the credit of these 70 scholars.
What’s interesting is that the Dead Sea Scolls were much closer to the Septaugint than to the BHS (oldest Hebrew manuscript existing today.)