Christina of Holstein-Gottorp was Queen of Sweden as the second wife of King Charles IX. She served as regent in 1605, during the absence of her spouse, and in 1611, during the minority of her son, King Gustav II Adolph.

Ebba Magnusdotter Brahe was a Swedish countess, landowner, and courtier. She is foremost known for being the love object of King Gustavus Adolphus of Sweden, and because he wished to marry her prior to his marriage, plans which were however never realized. Their love affair has been famous in the Swedish romantic history and the subject of fiction, and are documented in their preserved correspondence.