(silver) Beatrice Armstrong
1920 diving - platform
(gold) Mary Carew (a.k.a. Armstrong)
1932 4x100 m relay
(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
(bronze) Dylan Armstrong
2008 shot put
(silver/gold) Elizabeth Armstrong
2008; 2012 water polo
(gold) Kristin Armstrong
2008; 2012 cycling - road