Scribble

Bill and Melinda Gates —

Bill and Melinda Gates are the world's wealthiest couple according to a report out today from Wealth-X.

Scott Olson

Spanish businessman Amancio Ortega Gaona became Europe's richest man after founding the successful <a href="index.php?page=&url=http%3A%2F%2Fmoney.cnn.com%2F2015%2F02%2F10%2Fnews%2Fcompanies%2Fangora-rabbit-wool-ban-inditex%2Findex.html%3Fsr%3Dtwmoney1230prabbitfurban1230pstory">global fashion chain Zara</a> in 1975.

Amancio Ortega Gaona and Flora Perez Marcote —

Spanish businessman Amancio Ortega Gaona became Europe's richest man after founding the successful global fashion chain Zara in 1975.

Xurxo Lobato

Warren Buffett and Astrid Menks —

Famed billionaire investor Warren Buffett married his second wife Astrid Menks in 2006, two years after the death of his first wife Susan Buffett.

Scott Olson

<a href="index.php?page=&url=http%3A%2F%2Fmoney.cnn.com%2Fvideo%2Fnews%2F2015%2F05%2F07%2Fthe-koch-brothers-in-80-seconds.cnnmoney%2Findex.html">David Koch and his brother Charles Koch</a> made their fortune with Koch Industries, a huge oil and gas conglomerate which is among the biggest private companies in North America.

David and Julia Koch —

David Koch and his brother Charles Koch made their fortune with Koch Industries, a huge oil and gas conglomerate which is among the biggest private companies in North America.

Andrew Toth

Charles and Elizabeth Koch —

Charles Koch began working in the family business founded by his father in the 1960s and then took over as chairman and CEO in 1967, after his father's death.

Wichita Eagle