let's see: henry II was king and possibly ordered Thomas Becket's death, Saladin declared Egyptian independence, Belfast was founded, Venetians took over Verona, Frederick I (Barbarossa) failed to overthrow Pope Alexander III, it was mid-Song dynasty in China, Genghis Khan married Borte then rescued her when she was kidnapped, Muizzudin launched a first attack on India and Eleanor of Aquitaine was put in prison.
As this is an English-language quiz, I don't see where the "MUST" comes from. If you don't know the English name for Ekaterina, the failing is with you, not the quizmaster. If the quizmaster wants to accept alternative answers, the prerogative lies entirely with him.