Isan
Welsh saint
About Isan
Lived 501 – 550 (aged 48–49).
St Isan's church, Llanishen, Monmouthshire.Saint Isan was a 6th-century saint of South Wales and Patron Saint of Llanishen in Cardiff, Wales.
He was said to have been a follower of the 6th-century Celtic teacher St Illtyd. In A.D. 535 he and Saint Edeyrn came eastwards from the small religious settlement of Llandaff, aiming to establish churches, in the area around Caerphilly mountain. The sites they choose had fresh water from the Nant Fawr stream.
Isan established a settlement in what later became known as Llanishen in A.D. 537. The St Isan's Church was established on the site of 12th century church foundations.
His co-worker Edeyrn was reputed to have travelled widely, and as a result there are churches in North and South Wales dedicated to his memory. St Edeyrn gathered together a community of about 300 that lived and worshipped in the Llanedeyrn area.
Isan is remembered in churches at Llanishen, Monmouthshire and Llanishen, Cardiff.
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Important facts
Contemporaries
People whose lives overlapped Isan's
Frequently asked questions
Who was Isan?
Welsh saint
When was Isan born?
Isan was born in 501.
When did Isan die?
Isan died in 550.
Sources & further reading
Cite this page
APA: Biography.guide. (2026). Isan. https://biography.guide/isan/
MLA: "Isan." Biography.guide, https://biography.guide/isan/.
Chicago: "Isan." Biography.guide. https://biography.guide/isan/.
Data last updated: 2026-09-20 · Spot an error? Report a correction.
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