what uncle dudley?

http://www.youtube.com/watch?v=C1vx_HJkFfo

is it subject noun?

"Dudley H. Dudley is the legal guardian of Billy Batson, who refers to him as 'Uncle Dudley'."

http://youngjustice.wikia.com/wiki/Uncle_Dudley

Ohh! NOW I'm beginning to understand your question.

Please type your sentence here.

no is uncle Dudley a subject noun?

uncle Dudley is the popular storyteller in the county.

Yes. Uncle Dudley is the subject noun in this sentence.

is there a action verd?

or a linking verb?

is (is) a linking verb?