Petrus Alfonsi

Born in Spain, possibly in the city of Huesca, and trained as a physician, Petrus Alfonsi originally bore the name Moses ha-Sefardi. In 1104, he converted to Christianity under the patronage of King Alfonso I of Aragon (r. 1104–1134) and later moved to England, where he seems to have been in 1116, and then to northern France. He wrote a Latin anti-Jewish polemic, gathered together and translated into Latin a collection of moral tales, and also translated scientific works from Arabic to Latin.