The Kardashian sisters are fine with Blac Chyna joining the family, but taking on their famous last name? not okay. According to TMZ, Kim, Khloe, and Kourtney filed legal documents to prevent Chyna from making her final business transition into “Angela Renee Kardashian” to use for entertainment and social media platforms. The sisters allegedly stated if Blac gets the trademark they will “suffer damage including irreparable injury to their reputation and goodwill.”