What is this star next to the player name/health bar?

Question

While running around the world I spotted a player with a star next to their name as follows;

What does this star next to the player name/health bar represent?

Answer 1

This star is a reward for completing 100% of the whole map:

Upon completing the last map required for world completion, a world completion icon will pop up next to the loot icon. Players will receive:

• Normal map completion award
• 2 Gifts of Exploration
• The Map Completion Medal viewable from the account menu, unless already done on another character.
• A star next to your name, viewable by other players