These pictures are from The Encyclopedia of Things Which Never Were by Michael Page, illustrated by Robert Ingpen
Beansidhe
Camelot
Faerie Family Tree

These pictures are from Celtic Mythology by Arthur Cotterell
Parzival , by Martin Wiegand
Maeldun , by Alan Lee
Carbonek , by Alan Lee
Balor , by Alan Lee
Sidhe , by Alan Lee

Yes I am a big Brian Froud and Alan Lee fan.