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.

Austria
Latin
c1070 Magnvs (nom) UrkStyria 74
Estonia
Middle Low German
1419 Maugnus BbRT p. 348; 1592 Magnus Tiik1977 p. 287
Finland
Early Modern Swedish
1548 Mongs (gen) Audén1980 p. 168
Germany
Latin
c1070 Magnus (nom) UrkStyria 72; 1259 Magnus (nom) CDL-1.1.1 XXXI
Iceland
Middle Icelandic
1500 magnus (nom) DipIs-7 489
Italy
Latin
1285 Mainecti (gen) Perugia1285 p. 154
Sweden
Latin
1337 magnus (nom) SDHK 4361; 1350 Magni (gen) ibid. no. 6055, Magno (dat) ibid. no. 6060, Magnus (nom) ibid. no. 6005; 1351 Magnus (nom) ibid. no. 6012; 1356 Magno (abl) ibid. no. 7002, Magnus (gen) ibid. no. 7001; 1368 Magnus (nom) ibid. 9272, magno (abl) ibid. 9273; 1411 Magni (gen) ibid. no. 17654
Old Swedish
1358 Magnus (gen) SDHK no. 7337; 1383 Magnos SRA-vol2 no. 1936, Magnossa (gen) ibid. no. 1936, Magnus ibid. no. 1902, Magnussa (gen) ibid. no. 1910; 1409 Magnus (gen) SDHK no. 17268, Magnussa (gen) ibid. no. 17268; 1416 Magnus (nom) ibid. no. 18817, Magnussa (gen) ibid. no. 18817, Magnusse (dat) ibid. no. 18817
Early Modern Swedish
1543 Mågs (gen) Audén1980 p. 164, Mågz (nom) ibid. p. 164
Cite as: R. Le Get, S.L. Uckelman. "Magnus". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2017, no. 1. http://dmnes.org/2017/1/name/Magnus.