The de Castro surname is used by a Sephardic Jewish family of Portuguese, Spanish and Italian origin.
Soon after the establishment of the Portuguese Inquisition, members of the family emigrated to Bordeaux, Bayonne, Hamburg, and various cities in the Netherlands.
Their descendants were later found scattered throughout Turkey, Egypt, Holland, Germany, England, Italy, United States and Madras.
Note that Castro is not in origin Jewish but an Iberian Christian name, adopted by some Portuguese and Spanish Jews after the forced conversions of the late 15th and early 16th centuries.
Also in Barranquilla, Santa Marta, Tuluá Valle del Cauca in Colombia and Coro in Venezuela.