Prince William Windsor goes by Wills, and The Heir.
Brandon Windsor goes by Dino.
Claire Windsor went by Ola.
Their surname is Windsor- some people use 'Wales' as their surname because Prince Charles is the Prince of Wales, although this is incorrect and creates anger & resentment amongst Welsh people, since neither Charles, William or Harry ever go to Wales or have the slightest interest in the place.
Prince Charles goes by The Looney Prince.
Prince Bagdasarian goes by Ishcan.
Harold Prince goes by Hal.
Hugh Prince went by Hughie.
Philip Prince goes by Phil.
Prince Michael goes by Apple.
Steven Chester Prince goes by Prince.
Prince Andrew goes by Randy Andy.
Kristopher Prince goes by K-Dawg.