Are Morgan freeman and al freeman jr related?

Al is Morgan's son. He may be related (which I doubt), but he is not Morgan's son. The clue is in the name Al Freeman, Jr. His father was an actor by that name. He died in the 1950s.

No

Al Freeman Jr. is 77 years old (birthdate: March 21, 1934).

No Al Freeman Jr. did not die. He is alive and living in Washington DC.

No, Nelson Mandela is not related to Morgan Freeman though it is noted that they look alike.