According to Google's translation of hugenots-france.org, "In 1547, on
the death of Guy XVII, one of the last descendants of the lineage of
Laval, his county and the barony of Virte in it, accrue to her niece
Renée Rieux. The heiress was only twenty-three years. She was a Hugenot
She was known as "La Belle Châteauneuf," the name she is listed by in Her Wikipedia article, here.