Volcanus>falcon?

From: loreto bagio
Message: 31460
Date: 2004-03-17

I just found this
http://www.geocities.com/cas111jd/celts/celttrib.html
and got intrigued by one of the last lines in this table of Celtic
tribes.
It suggests something like a Celtic deity named Volcanus or Vulchalo
which of course sounds like a volcano being associated with a falcon.
I know of some other instances like this (within IE i.e. a seemingly
volcanic god associated with a bird) but here why? I mean is this
possible, that of the word falcon being derived from volcano?

Loreto