Charles I of Naples
Rossolimo is a Greek last name. According to researches of Alexander N. Rossolimo, the name is widely used on the Ionian Islands and especially Kefalonia. It originates from the French baron or general Hugues de Sully who was in the service of Charles I of Naples. His red hair got de Sully the nickname "Hugues le Rousseau" that was mixed from "Rousseau" and "Sully" to the name Rossolimo.