Félix Ignacio Juan Nicolás Antonio José Joaquín Buenaventura Berenguer de Marquina y FitzGerald, KOS (November 20, 1733 – October 30, 1826) was a Spanish naval officer, colonial official and, from April 30, 1800 to January 4, 1803, viceroy of New Spain.

Berenguer de Marquina was born in Spain to a family of the minor nobility of Alicante in 1733.

His mother, Mary FitzGerald, a native of Cork, could trace her ancestry back to the Anglo-Norman earls of Desmond.

He married María de Ansoátegui y Barrol in 1758, thus becoming, years later, the uncle of one of Venezuela's Libertadores, José Antonio Anzoátegui.

He had an extramarital relationship with a native woman named Demetria Sumulong with whom he sired a daughter from whom came the clan outside of the province of Cavite and Batangas.

A few of Notable descendants include, anti-American nationalist- Sen. Ramon Diokno, Secretary to Emilio Aguinaldo and Sec.

He was in command of a squadron in the Spanish navy when, on November 8, 1799, King Charles IV named him viceroy and captain general of New Spain and president of the Audiencia.

During the voyage from Cuba to Veracruz, he was taken prisoner by the British near Cape Catoche, Yucatán Peninsula (Quintana Roo).

He accepted the transfer of authority into his offices April 29, 1800, in the Villa de Guadalupe, and made his formal entry into Mexico City the following day.

They smuggled huge amounts of merchandise into the colony from the United States and the islands of the Caribbean and captured the Spanish ships in the coastal trade.

Fearing British raids, he reinforced the garrisons at Veracruz and ordered that the valuables of the port be moved to Jalapa and guarded.

Berenguer extended to the entire colony the requirement that no one be admitted into meetings of the guilds or confraternities without being decently dressed.

His public works in Mexico City were very limited — one fountain that never gave water, and the completion of Manuel Tolsá's equestrian statue of Charles IV.Berenguer, disgusted with the disallowance of some of his measures, resigned.