Kenneth Kaniff is a fictional character who was created by Eminem. He has a deep raspy voice which makes him sound like a creepy pedophile, which is implied in the few skits Eminem has made using him.
A lot of people now know Kenneth Kaniff through Whiteboy7thst, a famous youtuber who is a big fan of Eminem and uses the Kenneth Kaniff voice in some of his videos.