Namesakes
Fictional Characters from Television:
1 character
Marjorie Armstrong-Perugian 2013 Mom 
Hall-of-Famers:
1 ice hockey
(ice hockey) George Armstrong 1975
Notable Actors and Entertainers:
7 actors
Robert Armstrong 1890-1973
Alun Armstrong 1946-
Vaughn Armstrong 1950-
Curtis Armstrong 1953-
Bess Armstrong 1953-
Samaire Armstrong 1980-
Jonas Armstrong 1981-
Notable Athletes:
1 boxing, 1 cycling, 1 ice hockey
(boxing) Henry Armstrong 1912-1988
(ice hockey) George Armstrong 1930-2021
(cycling) Lance Armstrong 1971-
Notable Explorers and Adventurers:
1 explorer
Neil Armstrong 1930-2012
Notable Musicians:
2 musicians, 1 composer, 1 singer
Louis Armstrong 1901-1971
Craig Armstrong 1959-
Dido (a.k.a. Armstrong) 1971-
Billie Joe Armstrong 1972-
Olympic Medalists:
3 gold, 1 gold/silver, 1 silver, 1 silver/gold
(silver) Beatrice Armstrong 1920 diving - platform
(gold) Tate Armstrong 1976 basketball
(gold/silver) Duncan Armstrong 1988 swimming - 200 m freestyle; swimming - 400 m freestyle
(gold) Aaron Armstrong 2008 4x100 m relay
(gold) Kristin Armstrong 2008; 2012 cycling - road
(silver/gold) Elizabeth Armstrong 2008; 2012 water polo
Rock and Roll Hall-of-Famers:
1 musician
Billie Joe Armstrong 2015 Green Day