Kourtney recently opened up about why she picked the name for her son.

She starts off by saying "The first time I started looking at baby names, Mason was the only one I liked. It was the only one that stuck with me. Right before he was born, I told my aunt we were thinking about going with that for a name. She told me that Mason means the same thing in English that Kardashian means in Armenian — stone worker.”

She continued, "Another aunt told me my great uncle used to use the name Mason when he made dinner reservations, because Kardashian was too long. When I heard that, I thought, Oh my god, it’s meant to be.”

"Dash is not for my clothing store, as some people have suggested online. That would be stupid. Dash is short for Kardashian, and it was my father’s nickname.”

If you haven't seen pictures of Mason check them out Here