Kim described naming a child as "the hardest thing in life".

Kylie Jenner surprised fans last month when she announced she would be changing her newborn son's name - and the star has yet to find one that feels right. Now, her sister Kim Kardashian has revealed that Kylie felt "rushed" into picking a name at the time, announcing he would be called Wolf even though she wasn't 100 percent feeling it.

Speaking on Live With Kelly and Ryan, Kim said: "There’s one name lingering but she really wants to make sure.

"There’s ten days after the baby’s born that you have to name your child and I feel like they just felt rushed."

She described naming a child as "the hardest thing ever in life," adding that she herself wanted to wait until her kids – North, Saint, Chicago, and Psalm - were born before choosing names for them.

Kylie recently revealed that she's still deciding, but knew Wolf wasn't right for her son shortly after announcing it.

"We’re in the process, so it just wouldn’t feel right to share anything when we don’t have an official name," she said. "I knew the second I signed the birth certificate that I was probably gonna change his name.

"It just didn’t suit him."

Naturally, fans are continuing to speculate and a few of them have some pretty interesting theories. Some fans are convinced they've worked out the new name - Jack. The baby's original full name was Wolf Jacques Webster after his dad Travis, whose real name is Jacques Berman Webster II, and a YouTube video posted on Kylie's channel has some people convinced the second half of the name is here to stay. In the video, a montage titled 'To Our Son', Travis’ mother Wanda could be heard referring to the baby as Jacques - or Jack.