| Honorific Prefix: | The Most Excellent |
| The Duke of Liria and Jérica | |
| Honorific Suffix: | GE |
| Spouse: | Caroline zu Stolberg-Gedern |
| House: | Fitz-James Stuart |
| Father: | James Fitz-James Stuart, 3rd Duke of Berwick |
| Mother: | Maria Teresa de Silva y Alvarez de Toledo |
| Birth Date: | 25 March 1752 |
| Birth Place: | Liria, Valencia, Spain |
| Death Date: | 7 September 1787 |
| Death Place: | Madrid, Spain |
Don Carlos Bernardo Fitz-James Stuart y Silva, 4th Duke of Liria and Jérica, 4th Duke of Berwick (25 March 1752 – 7 September 1787) was a Spanish nobleman. Born in Liria, Spain, he was the son of James (Jacobo) Fitz-James Stuart, 3rd Duke of Berwick, and his wife, María Teresa de Silva y Álvarez de Toledo (a sister of Fernando, 12th Duke of Alba).
On 9 October 1771 he married Princess Caroline of Stolberg-Gedern (10 February 1755 – 15 April 1828), sister of the Jacobite consort Louise of Stolberg-Gedern and sister-in-law to Charles Edward Stuart, called by Jacobites King Charles III.
Carlos Fitz-James Stuart inherited his father's titles in 1785. In 1787, he lost by court order the titles held from the house of Columbus, namely the Dukedom of la Vega, the Dukedom of Veragua, the Marquisate of Jamaica, the Admiralty of the Ocean Sea and the Admiralty of the Indies, in favour of Mariano Colón de Larreátegui, who became the legal holder of said titles.
The Duke served as a Gentleman of the Bedchamber to King Charles III of Spain.[1]
The Duke of Liria and Jérica died in 1787 in Madrid, and was succeeded by his son Jacobo (as 5th Duke de Liria y Jérica and 5th Duke of Berwick).
. George Cokayne . . new, 13 volumes in 14 (1910-1959; reprint in 6 volumes. Gloucester, UK. . 2000 . II . 165.