Full name: Henning Waldemar Karlsson (-Carlson-)
Born: May 20, 1897 in Häverö, Norrtälje, Stockholm, Sweden
Died: May 21, 1978 in Hallstavik, Norrtälje, Stockholm, Sweden
Affiliations: Svenska Gymnastikklubben Posse, Boston (USA)
Waldemar Karlsson was only known as "Waldemar Carlson" while living in the United States. His brother Fritz Carlson won the Boston marathon in 1913.
Personal Best: Mar – 2-55:22 (1922).
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