[1] She was known as the Lady of Wiège and Fagnoles, lands she violently seized from her uncle and grandfather.

In 1389, she married Aubert Le Flamenc, Lord of Cany and Chamberlain to the king, Charles VI of France.

Mariette d'Enghien became the mistress of Louis I, Duke of Orléans, brother of King Charles VI.

[2][3] Their son, Jean de Dunois, was born in 1402[4][5] and became the comrade in arms of Joan of Arc.

She is a character in the novel In a Dark Wood Wandering by Hella S. Haasse.