What’s in a name? It turns out that with the Kardashians the answer involves a major cat fight! A livid Kim Kardashian is up in arms after her brother, Rob Kardashian, and her future sister-in-law, Blac Chyna, informed her they “plan to name their baby after her.”

“Kim was completely taken aback and didn’t know what to say,” a family insider exclusively told RadarOnline.com.

And Radar can reveal that Kardashian, 29, and 28-year-old Chyna are adding their own twist.

“They gave Kim an ever bigger shock when they informed her they’d spell their daughter’s name with a ‘Y.’”

Now the 35-year-old reality star is beyond furious about the honorific and is figuring out the right way to tell him and Chyna it’s a no go.

“She’s recruited their mom,” Kris Jenner, “to help, but unfortunately she and the rest of the family think the name is a great idea,” laughed the insider.

However, the tense situation is no joke to rapper Kanye West‘s wife.

“Kim may have to get legal papers drawn up if they go ahead because in her mind it could affect her brand to have two Kim Kardashians in the world,” explained the insider.

“It’s even worse that Kim’s formally added ‘West’ to her name, so theoretically Rob and Blac’s daughter could end up being the only Kim Kardashian!”