1931, "pertaining to the reign of Wilhelm II," emperor of Germany 1888-1918, from German Wilhelm (see William).
Examples from the Web for wilhelmine
Historical Examples of wilhelmine
Wilhelmine looked at her lover with the eyes of an astonished child.
A peremptory order from de Naarboveck had caused Wilhelmine to descend.
This mother was as unpleasant to behold as her son was the contrary, thought Wilhelmine.
He bowed pleasantly to Wilhelmine's companion, Mademoiselle Berthe.
Had he been happily inspired to speak so to him of the girl he loved, the enigmatic Wilhelmine?