So, naturally, ahead of Rocky's birth, his soon-to-be older siblings had many thoughts about the family's newest addition.

For her part, Alabama was initially against the moniker Rocky. But when her sibling—who was ultimately named after Suicidal Tendencies' Rocky George and "the greatest number of all time"—was born, she admitted his name kept in the family's tradition. 

"We all have very authentic, weird names," the teen previously told E! News. "I just think having another family member is always awesome. And getting to know a new person, it's gonna be so fun and so exciting!"

And she wasn't the only member of the Kardashian-Barker family looking forward to having a little sibling. During the Nov. 23 episode of The Kardashians—which was filmed when Kourtney was five months pregnant—Reign said of his future brother or sister, "I'm going to teach him how to play Call of Duty, Fortnite, Black Ops III, Zombies."

But if he ended up with a sister instead of a brother? 

"Still!" he confirmed. "She can be a cool person."

For more sweet moments with the blended Kardashian-Barker family, keep reading.