Namesakes
Fictional Characters from Television:
4 characters
Cliff Barnes (a.k.a. Clifford) 1978 Dallas 
Cliff Clavin (a.k.a. Clifford) 1982 Cheers
A. C. Slater (a.k.a. Clifford) 1989 Saved by the Bell
Greg Montgomery (a.k.a. Clifford) 1997 Dharma & Greg
Hall-of-Famers:
1 basketball
(basketball) Cliff Hagan (a.k.a. Clifford) 1977
Nobel Prize Winners:
1 physics
(physics) Clifford Shull 1994
Notable Actors and Actresses:
1 actor
Cliff Curtis (a.k.a. Clifford) 1968-
Notable Athletes:
2 basketball, 1 football, 1 soccer
(basketball) Cliff Hagan (a.k.a. Clifford) 1931-
(soccer) Cliff Huxford (a.k.a. Clifford) 1937-2018
(basketball) Clifford Luyk 1941-
(football) Cliff Branch (a.k.a. Clifford) 1948-2019
Olympic Medalists:
3 gold, 2 silver
(gold) Frank Wykoff (a.k.a. Clifford) 1928; 1932; 1936 4x100 m relay
(gold) Cliff Bourland (a.k.a. Clifford) 1948 4x400 m relay
(gold) Cliff Barker (a.k.a. Clifford) 1948 basketball
(silver) Clifford Harrison 1952 ice hockey
(silver) Glen Housman (a.k.a. Clifford) 1992 swimming - 1500 m freestyle