Did Rob Kardashian already say what he would name is child?

During Sunday's Keeping Up With the Kardashians, Rob joked that his son's name is "Robert the Third" months before it was revealed he is expecting a child with his fiancée Blac Chyna.

On the episode, Kris Jenner and Kourtney Kardashian were having lunch when Kris received a call from Rob.

During the conversation, Rob started joking around about having a son.

Kris asked Rob, "What's your son's name Rob?"

He then told Kris and Kourtney, "His name is Robert the Third, actually."