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.

Belgium
Old French
14thC Guiars (nom) AnNam p. 143, Gyars (nom) ibid. p. 143
Middle French
1351 Guiart AnNam p. 144
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; 1158x1170 Wiardus (nom) ibid. 138; 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; 1166 Wiardus (nom) ibid. 129; 1171 Guiardus (nom) ibid. 140, Wiardus (nom) ibid. 139; 1172 Wiardus (nom) ibid. 149; 1173 Wiardus (nom) ibid. 153; 1174 Wiardi (gen) ibid. 161; 1179 Guiardi (gen) ibid. 178, Guiardus (nom) ibid. 178, Viardi (gen) ibid. 176, Viardo (abl) ibid. 176, Viardus (nom) ibid. 176, Wiardi (gen) ibid. 178, Wiardo (abl) ibid. 176, Wiardum (acc) ibid. 175, Wiardus (nom) ibid. 174, Wuiardus (nom) ibid. 178; 1190 Wiardi (gen) CartNDdOurscamp CV; 1214 Wiardi (gen) ibid. CXLI; 1268 Guiardi (gen) NDParisII 2-V; 1269 Guiardi (gen) ibid. 2-III; 1378 Wiardi (gen) hanquetvol1 314
Old French
1292 Guiart 1292paris p. 1; 1296 Guiart paris1296 p. 17; 1301 Wiart (obl) MemPic-vol17 p. 282; 1313 Guiart Paris1313 p. 12
Cite as: S.L. Uckelman. "Guiart". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Guiart.