Isnard m. Old Saxon, Old High German īsarn 'iron' + Old Saxon hard, Old High German hart 'strong, hard'.

France

Latin

● c823 Isnardus (nom) irminon-vol2 61b, CE; 11thC Isnardus (nom) StVdM-II 677, Ysnardus (nom) ibid. 711; 1030 Isnardus (nom) ibid. 681; c1030 Isnardus (nom) ibid. 714; 1030 Ysnardus (nom) ibid. 712; 1031 Isnardus (nom) ibid. 684; c1035 Isnardus (nom) ibid. 718; 1038 Isnardus (nom) ibid. 719; c1040 Isnardus (nom) ibid. 725, Ysnardus (nom) ibid. 725; 1044 Isnardus (nom) ibid. 659; 1048 Isnardus (nom) ibid. 737; c1050 Isnardus (nom) ibid. 675; 1055 Isnardi (gen) ibid. 680, Isnardus (nom) ibid. 739; 1058 Isnardus (nom) ibid. 694; 1060 Isnardi (gen) ibid. 704; c1060 Isnardus (nom) ibid. 662; 1064 Isnardus (nom) ibid. 703, Ysnardus (nom) ibid. 715; 1064x1079 Ysnardus (nom) ibid. 690; 1069 Isnardus (nom) ibid. 717; 1070 Isnardus (nom) ibid. 740; 1073 Isnardus (nom) ibid. 706; 1075 Isnard (nom) ibid. 731; 1094 Ysnardi (gen) ibid. 686; 1163 Hisnardo (abl) clairvaux-12thc 104

Italy

Latin

● 961 isenardo (abl) CDC-II CCXII; 1464 Isnardus (nom) CUP-III-I CCXXXI