Edward, a dentist in Dobbs Ferry New York, loaned his son the money. In return, he was granted 2,000,000 shares of Facebook.

The options were arranged to expire after one year, but Facebook's board decided that wasn't fair.  It didn't match the original intent of Edward's grant. In late 2009, they issued Edward's company 2,000,000 Class B shares of Facebook.

Today those shares, reflected in Facebook's S-1, are worth about $60,000,000.

To see who else likely made a lot of money from their shares of Facebook, check out The First 20 Facebook Employees: Where Are They Now?