The Duchy or Duke of Rambouillet was a French Peerage created in 1711 for Louis Alexandre de Bourbon, Légitimé de France, Count of Toulouse, youngest legitimised son of Louis XIV and Madame de Montespan.
| Picture | Name | Father | Birth | Marriage | Became Duke | Ceased to be Duke | Death | Spouse | |
|---|---|---|---|---|---|---|---|---|---|
| Louis Alexandre de Bourbon, Légitimé de France, Count of Toulouse | Louis XIV of France (Bourbon) | 6 June 1678 | 2 February 1723 | 29 July 1711[1] | 1 December 1737 | Marie Victoire de Noailles | |||
| Louis Jean Marie de Bourbon, Duke of Penthièvre | Louis Alexandre de Bourbon, Count of Toulouse (Bourbon) | 16 November 1725 | 29 December 1744 | 1 December 1737 | 4 March 1793 | Princess Maria Teresa Felicitas of Modena | |||