Leontius of Jerusalem (Greek: Λεόντιος, ca.485 - ca.543,[1] though debated) was a Byzantine Christian theologian, monk and proponent of the Council of Chalcedon.
In P. T. R. Gray's (Professor of Religious Studies York University) Leontius of Jerusalem: Against the Monophysites: Testimonies of the Saints, he states, "he is not at all scholarly–he is downright sloppy, in fact–when it comes to the texts he himself wishes to cite.
[5]: 231 The first scholar to identify and challenge the ambiguity of the writings that come down to us under the name of "Leontius" was Friedrich Loofs in 1887, arguing for a single author of the corpus leontianum.
Richard considered the two Leontii to be contemporaries living during the time of Justinian, and for decades the common opinion of scholars shared this conclusion.
[7]: 649 Based on more current scholarship and his own conclusions, Krausmüller has concluded that Leontius of Jerusalem does not belong to the reign of Justinian, as formerly supposed, but to a later date, as he must have written the Contra Nestorianos in 614 at the earliest.