Clair de Lune is French for moonlight.
It is thought to have been inspired by a poem of the same name by Paul Verlaine (1844 – 1896) :
Your soul is a chosen landscape
Where charming masked and costumed figures go
Playing the lute and dancing and almost
Sad beneath their fantastic disguises.
All sing in a minor key
Of all-conquering love and careless fortune
They do not seem to believe in their happiness
And their song mingles with the moonlight.
The still moonlight, sad and beautiful,
Which gives the birds to dream in the trees
And makes the fountain sprays sob in ecstasy,
The tall, slender fountain sprays among the marble statues.