Gregory of Nyssa غريغوريوس النيصي was a Christian bishop and saint. He was a younger brother of Basil the Great, and a good friend of Gregory Nazianzus. His significance has long been recognized in the Eastern Orthodox, Oriental Orthodox, and Roman Catholic branches of Christianity. Some historians identify Theosebia the deaconess as his wife, others hold that she, like Macrina the Younger, was also a sister of Gregory and Basil. Wikipedia
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