Marie Louise was the first child born to Charles Godefroy de La Tour d'Auvergne and his wife Maria Karolina Sobieska, granddaughter of John III Sobieski and an older sister of Clementina Sobieski, wife of James Francis Edward Stuart.

[1] He was the son of the late Louise Hippolyte, Princess of Monaco, and her consort Jacques Goyon de Matignon.

[1] Eventually, she married Jules Hercule Mériadec de Rohan, Duke of Montbazon, Prince of Guéméné.

Through her mother, Marie Louise could count Holy Roman Empress and Electress of Saxony as her cousins.

Her aunt, Anne Marie Louise de La Tour d'Auvergne, had already married into the House of Rohan, which ranked as foreign princes at the court of Versailles.

During Mary Louise's convalescence, her family received a sympathy note from her first cousin, Charles Edward Stuart, also known as "the Young Pretender."

In January 1748, when confronted by her father and mother-in-law, Marie Louise was forced to write Stuart and end their affair.

It was her mother-in-law who wrote to Charles's father, "the Old Pretender," in Rome to report the news, albeit not that the infant was his grandchild.

Louise is a character in the 1992 Diana Gabaldon novel Dragonfly in Amber, and is portrayed by Claire Sermonne in season 2 of the television adaptation, Outlander.