Dictionary of Medieval Names
from European Sources

Isarn m. Old Saxon, Old High German īsarn 'iron'.

France
Latin
10thC Ysarni (gen) St-Bernard-Romans 134; 952 Isarni (gen) ibid. no. 108; 11thC Isarni (gen) ibid. 135; 1030 Isarnus (nom) StVdM-II 681; 1030x1070 Ysarni (gen) St-Bernard-Romans no. 103; 1031 Isarnus (nom) StVdM-II 685; 1045 Isarno (abl) ibid. 691; 1048 Ysarnus (nom) ibid. 737; 1115 Isarnus (nom) ibid. 734; 1273 Isarni (gen) RegToul-13thC p. 40, Isarno (abl) ibid. p. 23, Isarnus (nom) ibid. p. 23; 1274 Isarni (gen) ibid. p. 57; 1275 Isarnus (nom) ibid. p. 42
Spain
Latin
1014 Issarnus (nom) CDCB-XV MMCLXXII
Cite as: S.L. Uckelman. "Isarn". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2017, no. 1. http://dmnes.org/2017/1/name/Isarn.