Elon Musk became a dad, again. And this time around, it's yet another boy for him, though it is Grimes' first baby ever. Grimes is a stage name for Claire Boucher, and according to Elon Musk Twitter account, both momma and little boy seem to be doing fine. This is technically Elon Musk's seventh child and also his seventh son. With this little boy, he now has six children since his first little boy, Nevada Alexander Musk, tragically died of SIDS when he was just ten weeks old.