ce, cad(a)-nce\ as a girl’s name is a variant of Cadence (Latin), and the meaning of Cadance is “with rhythm”.  
Read more at http://www.thinkbabynames.com/meaning/0/Cadance#6RC62DFGmwdWxEpM.99
 
Hasbro hasn’t called her Cadence in months, but why do people act like it’s an entirely different name anyway? It’s just a more modern variation…
 
Plus, it’s a perfect way to get all searches of the name to turn up your character. Cadence is a relatively common name, Cadance isn’t. The latter returns 99% pony in Google while the former doesn’t.