The most common name of the bunch, the first Kardashian kid's moniker also has a sentimental meaning. As Kourtney explained to Life & Style
shortly after his birth on Dec. 14, 2009, Mason shares the same meaning in English that Kardashian has in Armenian: stone worker. As for his middle name, the reality star explained, "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."