The unique name Rihanna has chosen for her almost one year old son has finally been revealed. According to a birth certificate obtained by MailOnline, the son that Rihanna, 34, shares with rapper A$AP Rocky is named RZA Athelston Mayers.The unusual moniker is inspired by New York-based hip hop group Wu-Tang Clan, who both Rihanna and A$AP - real name Rakim Mayers - are thought to be huge fans of.