Ezidy are neither Christians nor Muslims. Their religion recognized as hard to comprehend for outsiders thus it is a monotheistic religion (single God - the creator centered). Their holy place is a Lalesh temple near Mosul, Iraq. They believe it is a place where God started to build Earth. There are also seven archangels and they worship the sun as well which brings a few pagan strings. In short, it is really a complicated cult.
Are they like the Zorastrians (sp?)?
There are still some of those folks around, I think Zubin Mehta is one.