Amaury de Mauvoisin, Lord of Rosny

Amaury de Mauvoisin (born c. 1311) was the fourth son of Guy VI de Mauvoisin, baron of Rosny-sur-Seine, and Laure de Ponthieu. He became a canon in Paris.

When his elder brother Guy VII died without male heirs, Amaury held the family lordship and on 29 April 1365 sold Rosny to his niece Béatrix. In 1394 he and his brother Pierre were still granting woodland in the forest of Chevry to another niece.