Question: Who is Theodora Kantakouzene (Wife Of Alexios Iv Of Trebizond)'s mother-in-law?
Sentence (from "Alexios IV of Trebizond"): Alexios IV Megas Komnenos or Alexius IV (1382–1429), Emperor of Trebizond from 5 March 1417 to October 1429.
Relevant evidence: No