Guillaume de l'Aubespine de Châteauneuf (1547–1629) was a French diplomat in London between 1585 and 1589, involved in the affairs of Mary, Queen of Scots. He became the Marquis of Châteauneuf.
- Occupation
- diplomat
- Position held
- ambassador of France to England, Superintendent of Finances
- Citizenship
- France
- Born
- August 17, 1547
- Died
- March 16, 1629
