Rob Kardashian and Blac Chyna

Rob Kardashian and Blac Chyna

*Blac Chyna, born Angela White, will take her husband-to-be Rob Kardashian’s last name after they are married and rebrand herself as Angela Kardashian, her rep tells Us Weekly.

Kardashian gave Angela a 7-carat diamond engagement ring designed by jeweler Ben Baller, who told Us Weekly that Rob offered input into its design.

“She was very excited and loves the ring. She’s happy with him and very happy,” says her rep.

Kardashian’s famous family has yet to comment on their engagement. Blac Chyna’s ex Tyga, currently dating Kardashian step-sister Kylie Jenner, tweeted support for the engaged couple on Tuesday, saying everyone deserves happiness, but that he also has concerns for the son he shares with Blac Chyna.

Blac Chyna has since expressed doubt over Tyga’s public support. According to TMZ, sources directly connected to Chyna say Tyga has gone to great lengths to drive a wedge between their son, King, and her.

We’re told he’s filed legal docs trying to wrestle custody from her and will not back down.

Our sources say Tyga will not even speak to Chyna … their only direct contact is email. We’re told he changed his cell and won’t give her the new number. Most of the parenting decisions are made with their nanny as the go-between.

What’s more, our Chyna sources say Tyga and his crew have been on a campaign to destroy her reputation, calling her a “drunk whore,” “deadbeat mama” and “nasty b**ch.”