Namesakes
Fictional Characters from Books:
1 hero
Horatio Hornblower 1937 The Happy Return 
Fictional Characters from Television:
3 characters
Ben Seaver (a.k.a. Horatio) 1985 Growing Pains
Horatio Caine 2002 CSI: Miami
Donald "Ducky" Mallard (a.k.a. Horatio) 2003 NCIS
Notable Actors and Entertainers:
1 actor
William Powell (a.k.a. Horatio) 1892-1984
Notable Military Figures:
1 admiral
Horatio Nelson 1758-1805
Notable Politicians and Statespeople:
1 politician
Hubert Humphrey (a.k.a. Horatio) 1911-1978
Olympic Medalists:
1 bronze, 1 silver
(bronze) Horatio Poulter 1912 shooting
(silver) Horatio Fitch 1924 400 m
Shakespearian Characters:
1 character
Horatio Hamlet