About Giolla Íosa Mac Fir Bisigh
Giolla Íosa Mac Fir Bisigh was a mathematician, astronomer, historian, genealogist and poet.
Gilla Isa Mac Fir Bisigh (died 1301) was an Irish historian, poet, mathematician and astronomer.
Sub anno 1301, the Annals of Connacht record the death of Gilla Isa Mac Fir Bisig, ollam of the Ui Fiachrach Muaide, a master of history and tales and poetry, of the Computus and of many other arts.
His family, the clan Mac Fhirbhisigh, were at the time resident in what is now County Mayo. His father was Gilla Isa Mor Mac Fir Bisigh. Other notable members of his family were
Amhlaoibh mac Fir Bhisigh, fl. c. 1200. Domhnall na Sgoile Mac Fir Bhisigh, fl.c. 1250. Giolla Íosa Mór Mac Fhirbhisigh fl. 1390–1418. Dubhaltach MacFhirbhisigh, died 1671.
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Important facts
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Frequently asked questions
Who was Giolla Íosa Mac Fir Bisigh?
Poet, historian, scientist
When did Giolla Íosa Mac Fir Bisigh die?
Giolla Íosa Mac Fir Bisigh died in 1301.
What was Giolla Íosa Mac Fir Bisigh's occupation?
Giolla Íosa Mac Fir Bisigh was a mathematician, astronomer, historian, genealogist and poet.
Sources & further reading
· Wikipedia: Giolla Íosa Mac Fir Bisigh
· DBpedia: Giolla Íosa Mac Fir Bisigh
Cite this page
APA: Biography.guide. (2026). Giolla Íosa Mac Fir Bisigh. https://biography.guide/giolla-iosa-mac-fir-bisigh/
MLA: "Giolla Íosa Mac Fir Bisigh." Biography.guide, https://biography.guide/giolla-iosa-mac-fir-bisigh/.
Chicago: "Giolla Íosa Mac Fir Bisigh." Biography.guide. https://biography.guide/giolla-iosa-mac-fir-bisigh/.
Data last updated: 2026-09-20 · Spot an error? Report a correction.
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