Entry Version: This is the English version of this article translated by Patrick Hogan. The original Italian version was written by Paola Ascheri and first published on 05/06/2009. Here is the Italian version of this entry. Grammarian: Name: Demetrius [7] | Δημήτριος Place of Origin: ? Date: ante 3rd c. CE ↓ To Source List Biography: Demetrius was the author of a treatise entitled Περὶ λόγου συναφῆς, and he is cited exclusively in the late and probably spurious part of Porphyry’s 1 commentary2 on Ptolemy’s 3 Harmonica4, among those who treated the concepts of διάστημα and λόγος as not comp…