Latin-language Irish writers

Saint Patrick was a fifth-century Romano-British Christian missionary and bishop in Ireland. Known as the "Apostle of Ireland", he is the primary patron saint of Ireland, the other patron saints being Brigid of Kildare and Columba. He is also the patron saint of Nigeria. Patrick is venerated as a saint in the Catholic Church, the Church of Ireland, Lutheranism, and in the Eastern Orthodox Church, where he is regarded as equal-to-the-apostles and Enlightener of Ireland.

Irish Catholic philosopher and theologian (c. 800 – c. 877)

Irish philosopher (1670-1722)

Saint Columbanus (; 543 – 21 November 615) was an Irish missionary notable for founding a number of monasteries after 590 in the Frankish and Lombard kingdoms, most notably Luxeuil Abbey in present-day France and Bobbio Abbey in present-day Italy.

Archbishop of Armagh (1581-1656)

Dicuilus (Gaelic: ; fl.814–825 A.D.) was an Irish monk, astronomer, geographer and author born during the second half of the 8th century, possibly in the Hebrides. He travelled the Frankia around the turn of the 9th century and was involved with the Carolingian Renaissance under Louis the Pious. He was the author of astronomical and cosmographical treatises during the early 9th century, an example of Hiberno-Latin culture.

Irish teacher, Latin grammarian and scriptural commentator

Irish Franciscan historian

Dungal (fl. 811–828) was an Irish monk, teacher, astronomer, and poet. He was to live at Saint-Denis, Pavia, and Bobbio.

Irish Friar Minor and scholar

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.

thumb|100px|right|Statue of St Patrick from Agahower. Tírechán was a 7th-century Irish bishop from north Connacht, specifically the Killala Bay area, in what is now County Mayo.

Irish historian (1594–1666)

Irish abbot and scribe

Irish writer