Namesakes
Greek Prime Ministers:
7 prime ministers
Ioannis Kolettis 1834-1835; 1844-1847 
Gennaios Kolokotronis (a.k.a. Ioannis) 1862
Ioannis Metaxas 1936-1941
Ioannis Theotokis 1950
Ioannis Paraskevopoulos 1963-1964; 1966-1967
Ioannis Grivas 1989
Ioannis Sarmas 2023
Notable Athletes:
2 soccer
(soccer) Giannis Maniatis (a.k.a. Ioannis) 1986-
(soccer) Giannis Fetfatzidis (a.k.a. Ioannis) 1990-
Olympic Medalists:
2 bronze, 1 gold, 1 silver
(silver) Ioannis Andreou 1896 swimming - 1200 m freestyle
(bronze) Ioannis Theodoropoulos 1896 pole vault
(bronze) Ioannis Persakis 1896 triple jump
(gold) Ioannis Malokinis 1896 swimming - 100 m freestyle for sailors