of the Shattered Sun

The title of the Shattered Sun was introduced in Patch 2.4.0, and is given to players who complete the quest  [70] A Magnanimous Benefactor. The quest becomes available to players who are exalted with the Shattered Sun Offensive and after Sun's Reach Harbor has been reclaimed. To complete the quest, the player must simply donate 1000.

The title will show up after the character's name, like so:

<Name> of the Shattered Sun

This is only on a per-character basis. If you had a character who reached exalted but opted not to or couldn't afford the 1000 previously, then reach exalted on a different character and bought the title, you would still need to spend 1000 on the first character to also have the title.