The ancient name of Gerona was Gerunda.
See Geiger's Jüdische Zeitschrift für Wissenschaft und Leben, p. 281. The Records of Narbonne bear evidence of sales of lands standing in the name of R. Kalonymos (Archives Israelites, 1861, p. 449). His ancestor, R. Machir, came to Europe in the time of Charlemagne.
R. Abraham ben Isaac (Rabad II) was author of the Rabbinic code; Ha-Eshkol, and was one of the intermediaries between the Talmudists of France and the Scholars of Spain. He died 1178.
A parasang is about 3-2/5 English miles, and the distance from Narbonne to Beziers is correctly given. 10 parasangs make a day's journey.
The King of Portugal is even now styled King of the Algarves.