Brad Pitt is upset over daughter Shiloh's decision to drop his last name

Brad Pitt is upset over daughter Shiloh's decision to drop his last name. 

Shiloh is Brad Pitt and Angelina Jolie's biological child and they have six kids together.

Shiloh has turned 18 years old and filed to drop "Pitt" from her last name.

Source said, “He’s aware and upset that Shiloh dropped his last name. He’s never felt more joy than when she was born. He always wanted a daughter".

"The reminders that he’s lost his children, is of course not easy for Brad. He loves his children and misses them. It’s very sad".

"He’s still happy with Ines [de Ramon]," the source continues, but the distance from his children "pains him."