Beverly P. Mortensen is a musician, composer, and scholar of ancient Jewish religion at Northwestern University. In 2006, she published the book The Priesthood in Targum Pseudo-Jonathan: Renewing the Profession (Studies in Aramaic Interpretation of Scripture 4), in which she strongly argues her thesis, that Targum Pseudo-Jonathan is a late 4th-century CE work and is meant as a manual for kohanim, Jewish priests.