88%RatingSave Gender Masculine Usage Norwegian Meaning & History From the Old Norse elements magn "power, strength" and herr "army, warrior". This name was coined in the 19th century [1]. Related Names Rootsmagn + herr PopularityDetails Last ranked #96 in 1956 Norway Name DaysName Days? Norway: May 29 Categories strength, war, warrior Sources & References Nordic Names Wiki, entry Magnar, available from https://www.nordicnames.de/wiki/Magnar.