Abba Yamata alikuwa mmonaki aliyefanya umisionari katika Ethiopia ya leo akaanzisha monasteri chini ya kanuni ya Pakomi huko Gar'alta. Ni kati ya kundi la Watakatifu Tisa wa Kanisa la Kiorthodoksi la Ethiopia wanaosemekana kukimbilia nchi hiyo kutoka sehemu mbalimbali za Dola la Roma kutokana na dhuluma zilizofuata Mtaguso wa Kalsedonia (451). Wengine ni Abba Panteleoni, Abba 'Aléf, Abba Gärima, Abba Guba, Abba Liqanos, Abba Aregawi, Abba Sehma, Abba Aftse. Wote walikuwa wamonaki wasomi waliohuisha Ukristo wa Ethiopia. Wanasemekana kuwa ndio watafsiri wa Agano Jipya kwenda lugha ya Ge'ez. Tangu kale anaheshimiwa kama mtakatifu. Sikukuu yake huadhimishwa tarehe 2 Novemba. Watakatifu wa Agano la Kale Orodha ya Watakatifu Wakristo Orodha ya Watakatifu wa Afrika Orodha ya Watakatifu Wafransisko https://dacb.org/stories/ethiopia/yam-ata/ The bishop Afonso Mendes, who had been the Roman Catholic Patriarch of Ethiopia under Emperor Susenyos, cited the "Chronicle of Axum" as saying about the Nine Saints, "In the days of Amiamid [i.e., Ella Amida] many monks came from Rum, who fill'd all the Empire; Nine of them stay'd in Tigre, and each of them erected a Church of his own Name."