ZUMA it is a short version of the Aztec name, MONTEZUMA, which means "frowns like the Lord," according to Moss. (Also, Zuma is a popular beach in Southern California.)
As for ROCK, well...that's what this couple does best! Moss recommends that Zuma bypass the first two names and use "Rock Rossdale." (However, that does sound a bit like a Flinstones character, come to think of it.)
What does the babynames.com community think about Gwen's new baby's name? "Disappointed," Moss confesses.