Ivo of Kermartin
Breton priest and saint (1253-1303)
Ivo of Kermartin, TOSF (17 October 1253 – 19 May 1303), also known as Yvo, Yves, or Ives (and in Breton as Erwan, Iwan, Youenn or Eozenn, depending on the region, and known as Yves Hélory (also Helori or Heloury) in French), was a parish priest among the poor of Louannec, the only one of his station to be canonized in the Middle Ages. He is the patron of Brittany, lawyers, and abandoned children. His feast day is 19 May. Poetically, he is referred to as "advocate of the poor".
Life
Born at Kermartin, a manor near Tréguier in Brittany, on 17 October 1253, Ivo was the son of Helori, lord of Kermartin, and Azo du Kenquis. In 1267 Ivo was sent to the Faculty of Law of Paris (University of Paris), where he graduated in civil law. While other students caroused, Ivo studied, prayed and visited the sick. He also refused to eat meat or drink wine. Among his fellow-students were the scholars Duns Scotus and Roger Bacon. He went to Orléans in 1277 to study canon law under Peter de la Chapelle, a famous journalist who later became bishop of Toulouse and a cardinal.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Jun 16, 2026. The linked authority identifier is Q358325. VIAF identifies the subject as 8189650. The Library of Congress control number is n82029211. 5 of 5 selected statements include explicit references; 1 carry qualifiers and 1 use preferred rank. The first chronological checks are 1253, 1303, 1267 and 1277.
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This entry incorporates text from “Ivo of Kermartin” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.