Namesakes
Finnish Presidents and Prime Ministers:
1 prime minister
(prime minister) Reino R. Lehto (a.k.a. Ragnar) 1963-1964 
Icelandic Presidents and Prime Ministers:
1 president
(president) Ólafur Ragnar Grímsson 1996-2016
Nobel Prize Winners:
1 economics, 1 medicine
(medicine) Ragnar Granit 1967
(economics) Ragnar Frisch 1969
Notable Athletes:
1 soccer
(soccer) Ragnar Sigurðsson 1986-
Notable Philosophers and Thinkers:
1 economist
Ragnar Frisch 1895-1973
Olympic Medalists:
2 bronze
(bronze) Lars-Erik Wolfbrandt (a.k.a. Ragnar) 1948 4x400 m relay
(bronze) Ragnar Lundberg 1952 pole vault