Czech music? Vonicka vs. V-Vonicka?

Several years ago I bought an album called Vonicka from a band performing on the Charles Bridge in Prague. I LOVE it. I'm not sure the group produced any other albums. I was poking around on the Internet today and found a band called
V-Vonicka. I'm not sure this is the same--the little bit I've streamed of V-Vonicka so far doesn't seem the same to me. Does anyone here really know their Czech music? What does the word Vonicka mean?