21 Richest Billionaires In The World

17. Amancio Ortega

Facebook CEO Mark Zuckerberg talks about the new Facebook email service at an announcement in San Francisco, Monday, Nov. 15, 2010. AP Photo/Paul Sakuma)
Todd Williamson/AP

Rating: $61.5 Billion

Though the notoriously shy owner of the Zara brand shuns media attention, his clothing brand has grown to be one of the biggest in the world.

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