Séamus mac Pilib Mac Mathghamhna

Séamus mac Pilib Mac Mathghamhna
Bishop of Derry
Church	Roman Catholic Church
In office	1503–1519
Predecessor	Domhnall Ó Fallamhain (1485–1501)
Successor	Ruaidhrí Ó Domhnaill (1520–1551)
Personal details
Born	Clones, County Monaghan
Died	1519 Derry

Séamus mac Pilib Mac Mathghamhna (died 1519) was the Bishop of Derry.

He was appointed Bishop-designate of Clogher on the 5 November 1494. John Edmund de Courcy was also Bishop of Clogher around this time and he did not renounce his claim to Clogher until 1502. Séamus then became Bishop of Derry from 26 November 1503 up until his death in 1519.

He was the son of the Coarb of Clones Abbey, Pilib mac Séamus Mac Mathghamhna and great-grandson of, Ruaidhri mac Ardghail Mor Mac Mathghamhna, who was King of Oriel from 1442–1446. His uncle, Niall mac Séamus Mac Mathghamhna (died 1488), was also appointed Bishop of Clogher before 14 June 1484, but the papal bulls were not expedited, John Edmund de Courcy went on to become Bishop instead. The Annals of the Four Masters mention his brother Niall who died on his way from Rome in 1484.

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