Among the VIP guests of Managing Partner, Shelli Azoff, and Ariana Grande's manager, Scooter Braun, in the exclusive Forum Club enjoying the Ariana Grande Dangerous Woman show at the Forum were Kim Kardashian and daughter, North West on March 31, 2017 in Inglewood, California. (Photo by Rich Fury/Forum Photos via Getty Images)

Sister trio Kim and Khloe Kardashian and Kylie Jenner have always been good at keeping business in the family and making the family a business, but now they are taking steps to trademark the names of their five collective children, TMZ reports.

The website has obtained documents that show the sisters want to attach the names of their children – SaintNorth and Chicago WestTrue Thompson and Stormi Webster – to retail products, including clothing, toys and skin care items.

The documents also show thatJenner, 21, the founder of the lucrative Kylie Cosmetics, has also filed a trademark for the name “Stormiworld.” Stormi, who turned a year old on Feb. 1, is Jenner’s child with rapper/producer Travis Scott.

The papers obtained by TMZ also show that the sisters want the ability to sign endorsements for others’ products, but there are no details.

North, Saint and Chicago West – the children of Kanye West and Kim Kardashian, are 5, 3 and 1 respectively.

True Thompson, 10-months-old, is the daughter that Khloe Kardashian had with the Cleveland Cavaliers’ Tristan Thompson. Their couple’s relationship has been famously tumultuous. In June, both posted many affectionate photos with one another to social media, but this was after Thompson had been caught multiple times in compromising situations with other women.

But recent reports indicate trouble may be back.

People reported that Thompson sent Khloe Kardashian flowers for Valentine’s Day but that they did not spend the holiday together.

“Khloe and True are happy in Los Angeles,” People quoted a source as saying. “They spend very little time in Cleveland, where Tristan is.”

The source also told people about Khloe Kardashian, “She very much acts like a single mom.”

The source added, “Her whole life is True,” according to People. “Khloe is a great mom. It’s so obvious how much she loves being a mom.”

The relationship between Kanye West and Kim Kardashian, however, seems to remain if public reports are to be believed.

Kanye West surprised his wife with a serenade from saxophonist Kenny G and multiple roses on Valentine’s Day.