Kim revealed the name on her app on Friday morning.
As The Blast previously reported, Kim and Kanye struggled to come up with a name and spent the last few days trying to decide. Kanye even admitted to photogs on Wednesday the couple couldn't think of a name.
The baby was born via surrogate early Monday morning. Kim made the baby announcement on Tuesday, saying, "We are incredibly grateful to our surrogate who made our dreams come true with the greatest gift one could give and to our wonderful doctors and nurses for their special care."
This is the third child for Kim and Kanye: they also have 4-year-old daughter North and 2-year-old son Saint.