Anthoine Brun (1599–1654), baron d'Aspremont, was a Burgundian (Franche-Comté) diplomat in the service of Philip IV of Spain.

He was a leading figure in organising resistance to the French invasion of Franche-Comté in 1636.

[1] As a representative of the king of Spain, he played an important role in the negotiations leading to the Peace of Münster (1648).

[2] Thereafter he became the king's first resident ambassador in the newly recognised Dutch Republic.

He took up residence in The Hague in mid-1649, his first official despatch as ambassador being dated 29 June 1649.