United Kingdom, June 10 -- Angelina Jolie and Brad Pitt's daughter Zahara has filed to drop "Pitt" from her surname.

The former couple's 21-year-old daughter is one of six children they had together before their split in 2016 after two years of marriage and more than a decade in a relationship.

According to PEOPLE magazine, court documents show Zahara filed a petition with the Superior Court of California for a change of name.

A source close to Brad, 62, told the outlet: "It's sad to see someone repeatedly publicise their successful alienation of their children from the other parent."

The filing is said to date back to April 28, just days after Zahara's brother Maddox, 24, filed to legally removed the Once Upon A Time In Hollywood act...