Saint Angelus

 Killed by the Cathars. From Catholicism: "Saint Angelus was born at Jerusalem and was the son of Jewish parents who had been converted to Christianity. He became a Carmelite priest and worked many miracles. He was martyred by heretics at Palermo in Sicily for defending the Catholic Faith."

From Wikipedia:

He was born in Jerusalem in 1185 to the Jewish parents Jesse and Maria.[1] His mother later converted to Roman Catholicism, and both he and his twin brother John were baptised when she converted. His parents died while he was in his childhood and the Patriarch Nicodemus oversaw their education until the twins turned eighteen. He and his brother John entered the Carmelites aged eighteen at the Saint Anne convent near the Golden Gate to commence their novitiate. The two could speak Greek as well as both Latin and Hebrew.[3][1]

In 1210, he was ordained to the priesthood in Jerusalem and he travelled in Palestine.[3] Miraculous cures were attributed to him around this time and his "acta" stated that he sought to avoid fame and withdrew to a hermitage in the desert (in imitation of Jesus Christ) when he was becoming popular for his miracles. He remained as a hermit on Mount Carmel when he was instructed in 1218[4] to leave for the Italian peninsula in order to preach against the patarini as well as the Albigensians and the Bulgars. He had likewise been instructed to go to Rome to obtain from Pope Honorius III confirmation of the new and definitive rule for the order (later granted in 1226).[3]

He set off on a Genoese ship on 1 April 1219 and stopped first in Messina before heading off to Civitavecchia before he ended up in Rome to meet with the pope. The friar preached in the Basilica of Saint John Lateran while in Rome where he met both Francis of Assisi and Dominic of Osma. It is said that he foretold that Francis would receive the stigmata while Francis foretold his premature death.[1] From there, he was a guest of the Basilians in Palermo where he was for over a month before preaching in Agrigento for over a month before settling in Licata. He had healed seven lepers and the ailing Archbishop of Palermo Bernardo de Castanea while in Palermo.[2] He settled on the Sicilian island though his fame as a wonderworker caused crowds to flock to him. He also had success in converting some Jews though most Jews in Palermo came to despise him for this since he himself was once Jewish.[2]

He wanted to convert a Cathar knight named Berenger (known also in sources as Berengarius).[2] Tradition states that Berenger was living in incest and that the friar convinced the knight's companion to leave Berenger. Berenger became enraged and had him attacked in front of the church of Santi Filippo e Giacomo in Licata on 1 May 1220, and was struck with Berenger's sword five times.[1] He died of his wounds within the week of 5 May and according to tradition asked for his assassin to be pardoned while urging the faithful not to avenge his death. He was buried at Santi Filippo e Giacomo. (Read more.)