Dictionary of Medieval Names
from European Sources

Isoard m. Old Saxon, Old High German īsarn 'iron' + Old High German wart 'guard, ward'.

France
Latin
11thC Isoardus (nom) StVdM-II 710; 1030 Isoardi (gen) ibid. 713, Isoardus (nom) ibid. 713; c1030 Ysoardus (nom) ibid. 714; 1031 Isoardus (nom) ibid. 684; c1035 Isoardus (nom) ibid. 718; c1040 Ysoardus (nom) ibid. 726; 1045 Isoardo (abl) ibid. 691; c1050 Isoardi (gen) ibid. 695, Isoardo (abl) ibid. 696, Isoardus (nom) ibid. 675; 1054 Isoardus (nom) ibid. 693; 1058 Isoardus (nom) ibid. 694; 1062 Isoardi (gen) ibid. 692, Isoardus (nom) ibid. 692; 1064 Isoardus (nom) ibid. 703; 1069 Isoardus (nom) ibid. 717
Cite as: S.L. Uckelman. "Isoard". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2017, no. 1. http://dmnes.org/2017/1/name/Isoard.