Demetrius:

By: Richard Gottheil , Eduard Neumann

Son-in-law of King Agrippa I. When Mariamne II., daughter of Agrippa I. and sister of Agrippa II., had put away Archelaus, the son of Chelcias, she married Demetrius, who was by birth and wealth among the foremost Jews of Alexandria, and held the office of alabarch about the year 49 C.E. By him Mariamne had a son, Agrippinus. The assumption that Demetrius was the son of Alexander, and hence the brother of the apostate Tiberius Alexander, is unfounded, and is not supported by Josephus. He probably belonged to the priestly family of Onias.

Bibliography:

Josephus, Ant. xix. 9, § 1;
xx. 7, § 3;
Brüll, in Geiger, Jüdische Zeitschrift, iii. 279;
Grätz, Monatsschrift, 1876, 217;
Schürer, iii. 88.

G. E. N.