Keratsa-Maria of Bulgaria was a princess of Bulgaria and Empress-consort of Andronikos IV Palaiologos. Wikipedia
Born: 1348, Second Bulgarian Empire
Died: 1390 (age 42 years), Byzantine Empire
Children: John VII Palaiologos
Spouse: Andronikos IV Palaiologos
Grandchild: Andronikos V Palaiologos
Parents: Ivan Alexander of Bulgaria and Sarah-Theodora