Eusebius a Nitrian monk (beginning of 5th century), one of the "four tall brothers" condemned by Theophilus, bishop of Alexandria, for defending the opinions of Origen. The three others were Dioscurus, Ammonius, and Euthymius. They retired first to Jerusalem and Scythopolis, and then to Constantinople, where Chrysostom received them kindly, but did not admit them to communion. They were "pious men, though not wholly exempt from a certain fanatical ascetic tendency." — Neander, Ch. Hist. 2:691; Sozomen, Hist. Eccl. 8:12, 13; Socrates, Hist. Eccl. 6:7.