Ewostatewos
Ewostatewos (Ge'ez: ኤዎስጣቴዎስ, ʾEwosṭātewos, or ዮስጣቴዎስ, Yosṭātewos, a version of Ancient Greek: Εὐστάθιος Eustathios; 22 July 1273 – 23 September 1352) was an Ethiopian religious leader of the Orthodox Tewahedo during the early period of the Solomonic dynasty of Ethiopian Empire. He was a forceful advocate for the observation of the Sabbath in Christianity.