of Girona and Rabbeinu Yonah רבינו יונה was a Catalan rabbi and moralist, cousin of Nahmanides.
He is most famous for his ethical work The Gates of Repentance and interpretation on Pirkei Avot- The Ethics of our Fathers.
Much of what is known about his life comes from a responsum by Solomon ben Simon Duran, one of his descendants.
Rabbeinu Jonah Gerondi ZL came from Girona, in Catalonia (present-day Spain).
He was the most prominent pupil of Solomon ben Avraham of Montpellier, the leader of the opponents of Maimonides' philosophical works, and was one of the signers of the ban proclaimed in 1233 against The Guide for the Perplexed and the Sefer ha-Madda.
Rabbeinu Yonah's commentary on Pirkei Avot - Ethics of the Fathers is the greatest and most beautiful commentary.
His is more in depth compared to those of Rashi and the Rambam.