Demetrius (Alexandrian librarian)
Prefect of the Alexandrian library who arranged for the Septuagint to be deposited there, and who answered Ptolemy's question about why no historian had mentioned the Law of Moses.
Preface and Praise of Sacred Scripture
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The Septuagint Translation and Greek Translators
— Arranged for the Septuagint version to be deposited in the Alexandrian library
"through Demetrius the prefect of the Alexandrian library"
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Moses as the Most Ancient Theologian, Philosopher, Poet, and Historian
— Answered Ptolemy's question about why historians hadn't mentioned the Law of Moses
"To which Demetrius replied"