The king in the Purim story.

 

Trivia Question: What was the name of Achashveirosh’s horse upon which he rode when he was coronated, and upon which Mordechai was led by Haman in the Purim story?

Answer: Name of horse of Achashveirosh- Shifrigaz.

Source: Targum Sheini (the second targum) printed in Mikraos Gedolos Chumashim after Megilas Esther (back of Chumash Shimos).