Namesakes
Fictional Characters from Books:
1 character
Harry Morgan 2004 Darkly Dreaming Dexter 
Fictional Characters from Television:
1 character
Harry Morgan 2006 Dexter
Nobel Prize Winners:
1 medicine
(medicine) Leland H. Hartwell (a.k.a. Harrison) 2001
Notable Actors and Entertainers:
2 actors
Harrison Page 1941-
Harrison Ford 1942-
Notable Athletes:
1 boxing, 1 football, 1 soccer
(boxing) Jack Dempsey (a.k.a. Harrison) 1895-1983
(soccer) Harrison Afful 1986-
(football) Harrison Smith 1989-
Olympic Medalists:
3 gold, 1 bronze
(bronze) Clarence DeMar (a.k.a. Harrison) 1924 marathon
(gold) Harry Glancy 1924 swimming - 4x200 m freestyle relay
(gold) Harrison "Bones" Dillard 1948; 1952 100 m; 110 m hurdles; 4x100 m relay
(gold) Harrison Barnes 2016 basketball
Other Royalty:
1 prince
Archie of Sussex (a.k.a. Harrison) 2023- United Kingdom