The musical word name Cadence, seemed to come out of nowhere to zoom up the charts; it rose over 700 spots between 2002 and 2004, and showed up in the Top 200 in 2007. It's gone down in the popular names list every year since then, though, and is now Number 376. Some might see it as a trendy feminine relative of the popular Caden. Kadence and Kaydence are also rising.
An early Cadence sighting was in the 1992 Armistead Maupin novel Maybe the Moon, in which the narrator heroine was a small actress called Cadence Roth, nn Cady. January Jones played a Cadence in American Wedding.