Girolamo Cavalcabo (known in France as 'Hieronyme' or 'Hieronymus') was a Bolognese fencing master, teaching in Rome and later Paris in the late sixteenth and early seventeenth centuries. Egerton Castle suggests that his father was Zacharia Cavalcabo, who published Angelo Viggiani’s treatise in 1567; indeed, Castle believes that Viggiani was Hieronyme’s fencing master. At some point, Girolamo traveled to Rome, where he perhaps first came into contact by the ‘Agrippan’ system of guards; Brantôme in his memoirs mentions a "Hiéronime" teaching in Rome.
In 1597, Seigneur de Villamont translated Cavalcabo’s manuscript 'Treaty or Instruction for Fencing' into French. Possibly because of this, Cavalcabo was appointed to the court of Henry IV of France to teach the Dauphin (later Louis XIII) and his brother Gaston D’Orleans; his son, César, was Master of Arms to the French Court until 1642.