In fact, she was the youngest child of Adhemar Dion and Therese Tanguay in Charlemagne, Quebec in Canada.
MARIE AMELIE THERESE (1782-1866), queen of Louis Philippe, king of the French, was the daughter of Ferdinand IV., king of Naples, and the archduchess Maria Carolina, daughter of the empress Maria Theresa, and belonged to the house of Bourbon.
Having lost his elder son in 1789 Louis left two children, Louis Charles, usually known as Louis XVII., and Marie Therese Charlotte (1778-1851), who married her cousin, Louis, duke of Angouleme, son of Charles X., in 1799.
The crown prince was also averse from a Napoleonic marriage, and preferred to marry (October 12, 1810) the Princess Therese of Saxe-Hildburghausen (1792-1854).
Lenotre, La Fille de Louis XVI., Marie Therese Charlotte de France, duchesse d'Angouleme, le Temple, l'echange, l'exil (1907).