Pax Thien Jolie has just been given one of the most converted last names in the world.

The latest addition to the Brangelina household is now officially a Jolie-Pitt just a few short months after his official adoption.

The three-year-old Vietnamese orphan now shares the same surname with brother Maddox and sisters Zahara and Shiloh.

Angelina adopted Pax, three, as a single parent because of Vietnam's strict rules about unwed couples adopting him. However, like with Maddox and Zahara, Brad will go through the same legal process to make Pax his son.

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