Some of the names on the Giving Pledge list are nationally famous -- Gates, Buffett, Rockefeller, Bloomberg, Turner, Lucas, Pickens, and a few others. But most signers of the pledge are only renowned in a city, like Dallas or Tulsa, or even in a professional locale, like Wall Street.

So in the gallery that follows you'll find short profiles of several pledgers not well-known to the general citizenry but definitely to be reckoned with in the worlds of wealth and philanthropy.

Last updated June 20 2011: 4:17 PM ET
Join the Conversation

The genesis of the Giving Pledge. More

The Facebook founder joins Buffett's quest. More

Market indexes are shown in real time, except for the DJIA, which is delayed by two minutes. All times are ET. Disclaimer LIBOR Warning: Neither BBA Enterprises Limited, nor the BBA LIBOR Contributor Banks, nor Reuters, can be held liable for any irregularity or inaccuracy of BBA LIBOR. Disclaimer. Morningstar: © 2014 Morningstar, Inc. All Rights Reserved. Disclaimer The Dow Jones IndexesSM are proprietary to and distributed by Dow Jones & Company, Inc. and have been licensed for use. All content of the Dow Jones IndexesSM © 2014 is proprietary to Dow Jones & Company, Inc. Chicago Mercantile Association. The market data is the property of Chicago Mercantile Exchange Inc. and its licensors. All rights reserved. FactSet Research Systems Inc. 2014. All rights reserved. Most stock quote data provided by BATS.