Rihanna and A$AP Rocky have welcomed a second baby boy into the world, TMZ reports. Sources told TMZ that the child was born on August 3, and that his name starts with an “R,” like those of his parents (whose given names are Robyn Rihanna Fenty and Rakim Athelaston Mayers) and his older brother, RZA Athelston Mayers, born last year on May 13.