Patrick S. (Patrick Stephen) Dinneen

Patrick Stephen Dinneen (1860–1934), also known in Irish as Pádraig Ua Duinnín, was born near Rathmore in County Kerry. He joined the Society of Jesus, was ordained a priest in 1894, and later dedicated himself to the study and promotion of Irish while continuing to serve as a priest.

Dinneen edited important Irish literary and historical texts, including works by Aogán Ó Rathaille and other Munster poets, and contributed greatly to the Irish Texts Society. His best-known work, Foclóir Gaedhilge agus Béarla, first published in 1904 and expanded in 1927, helped shape modern Irish vocabulary and orthography and remained a standard Irish–English dictionary for decades.