Telsa founder Elon Musk shocked the world earlier this week by revealing the name he and singer Grimes have chosen for their newborn baby.The happy couple decided to name their child X Æ A-12. Yep, the difficult to pronounce, or even read, name was confirmed when the billionaire tweeted: "Mom & baby all good." The 31 year old new mother then tweeted to explain the name: "X, the unknown variable.