Bryans won 10 major doubles, Aus in 06,07,09,10,11. U.s open in 05,08,10. Wimbledon in 06 and the French in 03, Bob also has a mixed with navritilova in the U.s open in 06 and Huber in 2010. Michael Chang french in 89 with Prince, Patrick Rafter has 2 single in U.S open 97,98, and 1 doubles australian 99, with Prince. Sharapova 3 with Prince, Will check on Pat Cash, i think he might have won his Wimbledon with Prince.
Without having done any research, I would guess Wilson since the brand has been around since I can remember and the brand is still alive today 2011. Congratulations Wilson.