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Dictionary of Medieval Names
from European Sources

Magnus m. Latin magnus 'large, great, powerful'.

The name of a 2nd C saint, a 3rd C saint, a 6th C saint, a 7th C French saint, a 7th or 8th C German saint, an three 11th C kings of Norway, an 11th C king of Denmark, two 12th C kings of Norway, two 12th C kings of Sweden, a 13th C king of Norway, a 13th C king of Sweden, a 14th C king of Norway and Sweden, and a 16th C king of Livonia.

Estonia
Middle Low German
1419 Maugnus BbRT p. 348; 1592 Magnus Tiik1977 p. 287
Sweden
Old Swedish
1383 Magnos SRA-vol2 no. 1936, Magnossa (gen) ibid. no. 1936, Magnus ibid. no. 1902, Magnussa (gen) ibid. no. 1910
Cite as: R. Le Get, S.L. Uckelman. "Magnus". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2015, no. 2. http://dmnes.org/2015/2/name/Magnus.