She was the sister of state secretary Schering Rosenhane and lived at Täckhammar in Södermanland.

Rosenhane was married on 17 June 1802 to Marshal of the Court Johan Jakob Frans Jennings.

According to a contemporary description, she was known "as excellent for her educated good sense as for her noble heart",[5] and became known as a financier and respected patron of the arts.

[6] In 1826-27, she and her spouse jointly donated a large part of the Rosenhane Library, which treated the subject of history, literature and language of Scandinavia and Sweden i particular, to the Royal Swedish Academy of Letters, History and Antiquities, Uppsala university and Strängnäs College.

[7] In the first National Portrait Gallery (Sweden) of Gripsholm, which was opened in the 1822, her portrait was featured among six of the most famous Swedish women in history along with Bridget of Sweden, Barbro Stigsdotter, Hedvig Charlotta Nordenflycht, Sophia Elisabet Brenner and Vendela Skytte.