Dictionary of Medieval Names
from European Sources

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

France
Latin
c11thC Guitardo (abl) St-Bernard-Romans no. 91; 1283–86 Guitardi (gen) GasReg-A p. 227; 1310 Guitardus (nom) ibid. p. 217
Spain
Latin
1019 Guitardus (nom) CDCB-XV MMCLXXIV
Catalan
1510 Guitard valencia1510 582
Cataln
1131 Guitard RusGeb p. 263
Cite as: S.L. Uckelman. "Guitard". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Guitard.