The Green Lady is the only one I know from a book I read -

http://www.hollowhill.com/uk/scotland-greenlady2.htm

Hermitage Castle has a pretty nasty reputation though -

http://www.undiscoveredscotland.co.u...tle/index.html

Here is a listing of Scottish castle ghosts -

http://scottishghosts.webs.com/castleghostsak.htm

Jim