Question: Who is the paternal grandmother of Theodora Palaiologina, Empress Of Bulgaria?
Sentence (from "Theodora Palaiologina, Empress of Bulgaria"): Thodora Palaiologina  was a Byzantine princess who became a Bulgarian empress as wife of the emperors Theodore Svetoslav from 1308 to his death in 1321, and Michael Shishman from 1324 to his fall in the Battle of Velbazhd on 28 July 1330.
Relevant evidence: No