Proper noun
Guienne
(historical) Obsolete form of Guyenne.
After Guienne province was transferred to the English Crown under the Plantagenets following the remarriage of Eleanor of Aquitaine in 1152, Périgord passed by right to English suzerainty. Source: Internet
In 1784 Fréminet sent six copies of a treatise about his machine hydrostatergatique to the chamber of Guienne (nowadays called Guyenne ). Source: Internet