Some people seem to see
Rochelle as deriving from the same root word hrok:
http://www.geocities.com/edgarbook/names/r/rochelle.html
By the way, one of the
German standard reference works about given names, from the "Duden Verlag", gives another etymology for
Rocco:
"Italian
Rocco, from
German Rochus, from Old High
German Roho, from the Old High
German word 'rohon' 'to roar, to shout' " (as for example in shouting war cries during battle).
Unfortunately that reference work does not list
Rochelle to confirm (or contradict) other sources that see the name as having the same origin...
Rene www.AboutNames.ch