Namesakes
British Prime Ministers:
2 prime ministers
Spencer Compton 1742-1743 
Spencer Perceval 1809-1812
Fictional Characters from Movies:
1 character
Spencer 2001 According to Spencer
Fictional Characters from Television:
4 characters
Spencer Lewicki 1999 Once and Again
Spencer Jordan 2000 Waking the Dead
Alexis Meade (a.k.a. Spencer) 2006 Ugly Betty
Spencer Shay 2007 iCarly
Hall-of-Famers:
1 basketball
(basketball) Spencer Haywood 2015
Nobel Prize Winners:
1 medicine
(medicine) Herbert Spencer Gasser 1944
Notable Actors and Entertainers:
4 actors, 1 reality star
Charlie Chaplin (a.k.a. Spencer) 1889-1977
Spencer Tracy 1900-1967
Spencer Pratt 1983-
Alexz Johnson (a.k.a. Spencer) 1986-
Spencer Locke 1991-
Notable Athletes:
1 basketball
(basketball) Spencer Haywood 1949-
Notable Filmmakers:
1 director
Charlie Chaplin (a.k.a. Spencer) 1889-1977
Notable Musicians:
1 singer
Alexz Johnson (a.k.a. Spencer) 1986-
Olympic Medalists:
1 bronze, 1 gold
(gold) Spencer Haywood 1968 basketball
(bronze) William Satch (a.k.a. Spencer) 2012 rowing
Oscar Award Winners:
1 actor
(actor) Spencer Tracy 1938; 1939 Captains Courageous; Boys Town
Other Religious Leaders:
2 leaders
Spencer W. Kimball 1973-1985 The Church of Jesus Christ of Latter-day Saints
Thomas S. Monson (a.k.a. Spencer) 2008-2018 The Church of Jesus Christ of Latter-day Saints
Rock and Roll Hall-of-Famers:
1 musician
Spencer Dryden 1996 Jefferson Airplane