Abba Saga

Abba Saga was the son of the Ethiopian king Zara Yaqob, and a monk of Ethiopian Christianity. His teacher was Abba Sabra, a monk of Ethiopian Christianity. He converted to Judaism after Abba Sabra, himself converted. Later Abba Sabra and Abba Saga, established a separate kingdom in modern day Ethiopia in which Jews were not persecuted, unlike the kingdom, of his father, who was known as "the exterminator of the Jews" in which Jews were severely persecuted.