Namesakes
Diogo Cão
(m) c. 1452-1486 
Notable Explorers and Adventurers
Cao Xueqin
(m) 1710-1765
Notable Writers
Agnes Tsao Kou Ying
(a.k.a. Cao) (f) 1833-1856
Saints
Cao Zhongrong
(m) 1981-
Olympic Medalists 2012 modern pentathlon (silver)
Cao Yuan
(m) 1995-
Olympic Medalists 2012 diving (gold)