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Dictionary of Medieval Names
from European Sources

Guiart m. Old Saxon widu, wido, Old High German witu 'wood' + Old Saxon hard, Old High German hart 'strong, hard'.

Spellings in W- are typical of Picardy.

France
Latin
1135 Guiardi (gen) clairvaux-12thc 7, Guiardo (abl) ibid. 7, Guiardus (nom) ibid. 7, Wiardus (nom) ibid. 7; 1138x1162 Wiardi (gen) ibid. 73, Wiardo (abl) ibid. 62, Wiardus (nom) ibid. 61; 1145 Wiardus (nom) ibid. 11; c1147 Guiardi (gen) CartNDdOurscamp LXII; 1147 Guiardi (gen) clairvaux-12thc 14, Guiardo (abl) ibid. 14, Guiardus (nom) ibid. 14; 1147x1153 Guiardo (abl) ibid. 26; 1147x1162 Guiardi (gen) ibid. 55, Guiardo (abl) ibid. 55, Guiardus (nom) ibid. 55, Wiardus (nom) ibid. 49; 1152x1156 Guiardus (nom) ibid. 31; 1158 Wiardus (nom) ibid. 33; a1163 Wiardo (abl) ibid. 98, Wiardus (nom) ibid. 96; 1163 Guiardi (gen) ibid. 99, Wiardi (gen) ibid. 95; 1163–64 Wiardi (gen) ibid. 106, Wiardo (abl) ibid. 106, Wiardus (nom) ibid. 106; 1164 Guiardus (nom) ibid. 122, Viardi (gen) ibid. 120, Wiardi (gen) ibid. 120, Wiardo (abl) ibid. 120, Wiardus (nom) ibid. 120; 1190 Wiardi (gen) CartNDdOurscamp CV; 1378 Wiardi (gen) hanquetvol1 314
Old French
1296 Guiart paris1296 p. 17; 1301 Wiart (obl) MemPic-vol17 p. 282; 1313 Guiart Paris1313 p. 12
Preview. DO NOT cite as: S.L. Uckelman. "Guiart". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2015, no. 1. http://dmnes.org/2015/1/name/Guiart.