Angelina Jolie and Brad Pitt newborn twins' names inspired by their parents heritage

Knox was named after Brad's grandfather Hal Knox Hillhouse, and also shares
the same last letter as the couple's adopted sons Maddox, six, and
four-year-old Pax.
Vivienne's middle name is in honor of Angelina's late mother Marcheline
Bertrand - who died last year.
Linda Rosenkrantz, co-author of 'The Baby Name Bible: The Ultimate Guide By
America's Baby-Naming Experts', explained: "Vivienne, the French form of
Vivian, reflects her place of birth - something her parents like to do - and
its meaning, 'life, alive' resonates in the uplifting way that her brother
Pax's name projects an image of peace."
Brad and Angelina also have a three-year-old adopted daughter Zahara and
two-year-old biological daughter Shiloh.

Image WENN