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Ailerán

650 – 664

Scholar, saint

Religious personWriter
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About Ailerán

Lived 650 – 664 (aged 13–14). Ailerán was an Irish religious person and writer.

Ailerán, also known as Ailerán Sapiens (Ailerán the Wise) was an Irish scholar and saint who died on 29 December 664 or 665. His feast day is 29 December.

Biography Ailerán was one of the most distinguished scholars at the School of Clonard in the 7th century. His early life is not recorded, but he was attracted to Clonard by the fame of St. Finnián and his various disciples. He became a lector of the school in 650. He died of the Yellow Plague, and his death is recorded in the Annals of Ulster. Because of his knowledge of the works of Origen, Philo, St. Jerome, St. Augustine, and others, he was well versed in patristic literature.

Works

According to John Colgan, numerous works can be ascribed to Ailerán, including the Fourth Life of Saint Patrick, a Latin litany, and the Lives of Saint Brigid and Saint Féichín of Fore. Ailerán's best known work is his Mystical Interpretation of the Ancestry of Our Lord Jesus Christ, according to the genealogy of Jesus in Saint Matthew's Gospel. Another work of his is titled A Short Moral Explanation of the Sacred Names, which could be a fragment of a larger work.

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Important facts

Born
650
Birth century
Occupation
Religious person, writer
Nationality
Positions held
Abbot
Also known as
Aileran

Frequently asked questions

Who was Ailerán?

scholar, saint

When was Ailerán born?

Ailerán was born in 650.

When did Ailerán die?

Ailerán died on 29 December 664.

What was Ailerán's occupation?

Ailerán was a religious person and writer.

What nationality was Ailerán?

Ailerán was Irish.

Sources & further reading

· Wikipedia: Ailerán

· Wikidata: Q3607110

· DBpedia: Ailerán

Cite this page

APA: Biography.guide. (2026). Ailerán. https://biography.guide/aileran/

MLA: "Ailerán." Biography.guide, https://biography.guide/aileran/.

Chicago: "Ailerán." Biography.guide. https://biography.guide/aileran/.

Data last updated: 2026-09-20 · Spot an error? Report a correction.

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