Final answer:
The Wicked Witch of the West was the first person to own the Golden Cap in The Wonderful Wizard of Oz.
Step-by-step explanation:
The first person to own the Golden Cap in The Wonderful Wizard of Oz was The Wicked Witch of the West. The cap had the power to command the Winged Monkeys, and the Witch used it to carry out her bidding. She used the monkeys to capture Dorothy and her friends in order to gain control over them and the Land of Oz.
Learn more about The Golden Cap in The Wonderful Wizard of Oz