It should come as no huge surprise that a poll of more than 50,000 people in 25 different countries would find Nelson Mandela the most respected and trusted person in the world.

But the next spot may be a bit more surprising.

According to the survey by the PR firm Reputation Institute, Swiss tennis star and 16-time Grand Slam winner Roger Federer took second. Following Federer in the top five were Bill Gates, Warren Buffett and English mogul Richard Branson.

Steve Jobs, Oprah Winfrey, Bono, Indian businessman Ratan Tata and Queen Elizabeth II rounded out the top 10, respectively.

The results of Reputation Institute’s study confirm that people respect leaders that participate in philanthropic activities outside of their own celebrity,” said Reputation Institute Chairman, Dr. Charles Fombrun. “The public’s top two on our list, Mandela and Federer, have emotional ties to South Africa, and donate both time and money to the betterment of the region and its people. They get praise for their efforts.”

[Yahoo!]