What is the role of a 'Moor' as in the McCarthy Moor?

This poem personifies the moon as a woman smiling over us.

The speaker admires the qualities and the position of the moon.

◘ The speaker in this poem respects nature.

◘ The speaker in this poem believes in Heaven.

moor is simply the English language pronunciation of the Irish word mór meaning great, big, mighty etc. so the expression means the "great" McCarthy etc