Alot. It depends on which book you are talking about.
3 of them I know of are Bluestar, Feathertail, and Silverstream.
In addition, there was Mistystar, Stonefur, Cinderpelt, Willowpelt, and much much more.
crowfeather, can't forget crowfeather. jayfeather too. cinderheart as well. stonefur has amder eyes, and i'm not thinking of stormfur!