Namesakes
Greek Prime Ministers:
10 prime ministers
Konstantinos Konstantopoulos 1892 
Konstantinos Demertzis 1935-1936
Konstantinos Tsaldaris 1946-1947; 1947
Konstantinos Georgakopoulos 1958
Konstantinos Dovas 1961
Konstantinos Kollias 1967
Konstantinos Karamanlis 1955-1958; 1958-1961; 1961-1963; 1974-1980
Konstantinos Mitsotakis 1990-1993
Kostas Simitis 1996-2004
Kostas Karamanlis 2004-2009
Notable Athletes:
3 soccer, 1 basketball
(basketball) Dinos Angelidis 1969-
(soccer) Kostas Katsouranis 1979-
(soccer) Kostas Mitroglou 1988-
(soccer) Kostas Manolas 1991-
Notable Filmmakers:
1 director
Costa-Gavras (a.k.a. Konstantinos) 1933-
Notable Writers:
1 poet
Konstantinos Petrou Kavafis 1863-1933
Olympic Medalists:
2 gold, 1 silver/bronze/gold
(silver/bronze/gold) Konstantinos Tsiklitiras 1908; 1912 high jump - standing; long jump - standing
(gold) Konstantinos II 1960 sailing - dragon
(gold) Kostas Kenteris 2000 200 m
Other Leaders:
4 presidents
President Konstantinos Tsatsos 1975-1980 Greece
President Konstantinos Karamanlis 1980-1985; 1990-1995 Greece
President Konstantinos Stephanopoulos 1995-2005 Greece
President Konstantinos Tasoulas 2025- Greece
Other Royalty:
2 kings
Konstantinos I 1913-1917; 1920-1922 Greece
Konstantinos II 1964-1973 Greece
Roman and Byzantine Emperors:
11 emperors
Emperor Heraclius Novus Constantinus (a.k.a. Konstantinos) 641
Emperor Constantinus Heraclius (a.k.a. Konstantinos) 641
Emperor Heraclius Constantinus (a.k.a. Konstantinos) 641-668
Emperor Constantinus (a.k.a. Konstantinos) 668-685
Emperor Constantinus (a.k.a. Konstantinos) 741-775
Emperor Constantinus (a.k.a. Konstantinos) 780-797
Emperor Constantinus Porphyrogenitus (a.k.a. Konstantinos) 913-959
Emperor Constantinus (a.k.a. Konstantinos) 1025-1028
Emperor Constantinus Monomachus (a.k.a. Konstantinos) 1042-1055
Emperor Constantinus Ducas (a.k.a. Konstantinos) 1059-1067
Emperor Constantinus Palaeologus Dragases (a.k.a. Konstantinos) 1449-1453