Surname Origin
First Name Entry

Feidhlim

An Irish masculine given name descended from Fedelmid or Feidlimid; its traditional meaning is ‘ever good’, although the exact etymology remains uncertain.

Last updated: 2026-08-10

Feidhlim is an Irish masculine given name. It is a shortened form of Feidhlimidh and belongs to the same historical name family as medieval Fedelmid and Feidlimid. “Ever good” is the established traditional gloss, but it should not be treated as a certain word-for-word translation of the ancient name.

Meaning: traditional, not certain

Patrick Woulfe's Irish Names and Surnames (1923) explains Feidhlim as a shortened form of Feidhlimidh and gives “the ever good” as the traditional explanation of the fuller name. Woulfe does not, however, provide a secure breakdown into separately attested name elements.

A possible comparison is Irish feidhil, defined as “enduring, constant” in Niall Ó Dónaill's Foclóir Gaeilge–Béarla. That comparison helps explain why modern summaries also offer “constant” or “enduring”, but resemblance to feidhil does not by itself establish the complete formation of Feidlimid. The careful answer is therefore that “ever good” is traditional, while the original linguistic construction is uncertain. Claims that the name literally means “warrior”, “brave man”, “deer”, or “performer” are not supported by the historical name sources used here.

How the spelling developed

The spellings belong to different periods of written Irish rather than to one fixed medieval form. Kathleen M. O'Brien's Index of Names in Irish Annals gives Fedelmid and Feidlimid as standardized Middle Irish forms (approximately 900–1200), and Feidhlimidh, Feidhlim, and Feilim as Early Modern Irish forms (approximately 1200–1700). The index also warns that annals were copied or compiled long after some of the events they describe, so the spelling in a surviving manuscript need not be the spelling a bearer used in his lifetime.

Woulfe's twentieth-century dictionary treats Feidhlim as the shorter form and Feidhlimidh as the fuller one. This makes Feidhlim a modern Irish continuation of a much older name, not the unchanged original spelling.

A name in the medieval record

One well-attested bearer was Feidlimid son of Crimthann, a ninth-century king of Munster. The Annals of Ulster, in entry U847, records his death and describes him as king of Mumu (Munster), a scribe, and an anchorite. The source is useful evidence for the personal name and the bearer's contemporary standing; it does not imply that every later Feidhlim was named for him or descended from him.

The name continued to appear in later annalistic material. O'Brien's index identifies 18 men under this name family in entries dated from 951 to 1556. Its examples show the spelling shift in practice: Fedlimid Mag Carthaig appears under 1300, Feidlim mac Briain Meg Mathghamna under 1466, and Feilim mac Donnchaidh mic Tighearnáin Ó Ruairc under 1500. These examples place the name among clerics, learned men, and members of several Gaelic dynasties. They demonstrate repeated use across centuries, but they are a sample from selected annals rather than a population count or a continuous pedigree.

Felim, Phelim, and other equivalent forms

Woulfe gives Phelim, Felimy, and Phelimy as English-language forms associated with Feidhlim or Feidhlimidh. Felim is another familiar anglicized spelling, while Feilim is found within the Irish-language spelling tradition. Older historical texts and modern editions may use Fedelmid, Fedlimid, or Feidlimid.

Woulfe also lists Felix and Philip in parentheses. These are best understood as conventional English substitutions once used for the Irish name, not as cognates and not as translations of its linguistic elements. A record that alternates between Phelim and Philip may concern the same person, but the names are not etymologically the same.

Saint Felim and Kilmore

The Anglicized form Felim survives prominently in the religious tradition of County Cavan. The Roman Catholic Diocese of Kilmore identifies St Felim as its patron and says that, according to diocesan tradition, he founded a church at Kilmore in the sixth century. The present cathedral in Cavan is dedicated to Saints Patrick and Felim. This tradition helps explain why the Felim form remains culturally recognizable, even though the surviving evidence does not support a detailed modern biography of the early saint.

Given name, not a family origin

The linguistic dictionaries and annal index consulted for this page treat Feidhlim and its historical forms as personal names. They do not establish Feidhlim as a traditional hereditary surname. If it appears in a modern database's surname field, the entry may reflect reversed name order, indexing, or an individual modern usage and should be checked against the original record.

Nor does the name identify one lineage. Medieval kings, clerics, saints, and later Gaelic nobles could bear related forms without belonging to a single Feidhlim family. The name's etymology explains a naming tradition; it does not prove genealogy.

References