Whose Skull Does Hamlet Speak to?

Hamlet picks up a skull, and the gravedigger tells him that the skull belonged to Yorick, King Hamlet's jester.

What skull Hamlet holds?

In the Hamlet skull scene, Hamlet holds Yorick's skull and contemplates on the vanity of his own life.

How does Hamlet feel about Yorick's skull?

Yet upon looking at Yorick's skull, Hamlet suddenly feels sickened. He realizes what becomes of even the best of people after death—they rot away. ... Speaking to and about Yorick's skull, Hamlet notes that Yorick's lips no longer exist, which leads him to note that Yorick's jokes, pranks, and songs are gone, too.