'Whose' in the Bible

There was a certain Jew in the citadel of Susa whose name was Mordecai the son of Jair, the son of Shimei, the son of Kish, a Benjamite,

Then Harbonah, one of the eunuchs serving the king said, “Now look, there are gallows fifty cubits (75 ft.) high standing at Haman’s house, which Haman made for Mordecai, whose good warning saved the king.” And the king said, “Hang him on it.”