AMBROSIASTER. A commentary on St. Paul's epistles, "brief in words but weighty in matter," and valuable for the criticism of the Latin text of the New Testament, was long attributed to St. Ambrose. Erasmus in 1527 threw doubt on the accuracy of this ascription, and the author is usually spoken of as Ambrosiaster or pseudo-Ambrose. Owing to the fact that Augustine cites some parts of the commentary on Romans as by "Sanctus Hilarius" it has been ascribed by various critics at dif ferent times to almost every known Hilary.
See Souter, Study of Ambrosiaster (1905), with references given there.