List of kings of Uí Failghe
Wikimedia list article
Uí Failghe seems to have existed as a kingdom in Ireland since at least the early historic era, and successfully fought off encroachments by the Uí Néill, the Eóganachta, and most especially the Normans. From the mid eleventh century its dynasty adopted the surname Ua Conchobhair Failghe, or O Connor Faly (they were unrelated to the other notable Ua Conchobhair dynasties of Connacht and Kerry). Their seat was originally in Rathangan, County Kildare but moved to Daingean with the Norman arrival.
In the 1530s Brian supported the revolt of Silken Thomas; on his defeat he was pardoned and was given the title "Baron of Offaly".
On the death of the last de facto king, and de jure baron, Brian mac Cathaoir O Conchobhair Failghe, in about 1556, Uí Failghe was split between the modern day counties of King's County (Offaly), Queen's County (Laois) and County Kildare by Mary I of England during the Plantations of Ireland. Two Baronies in County Kildare, Offaly East and Offaly West, retained the anglicised name of the Kingdom. Upon Irish independence King's County was renamed as County Offaly.
Early kings
Failge Berraide (flourished 507-514)
Bruidge mac Nath Í (died 579)
Áed Rón mac Cathail (died 604)
Ailill mac Áedo Róin (died 639)
Cillíne mac Forannáin (died 652)
Fland Dá Chongal
Forbassach Ua Congaile (died 714)
Ailill Corrach mac Flainn (died 741)
Flaithnia mac Flainn (died 755)
Cummascach mac Flainn (died 757)
Cináed mac Flainn (died 770)
Mugrón mac Flainn (died 782).
Domnall mac Flaíthnia (died 783)
Óengus mac Mugróin (died 803)
Flaíthnia mac Cináeda (died 806)
Cináed mac Mugróin (died 829)
Mugrón mac Óengusa (d.842)
Niall mac Cináeda (d.849)
Máel Sinchill mac Mugróin (d.881)
Conchobar mac Flannacáin (d.891)
Uathmarán mac Conchobair (d.897)
Later kings c.1051-c.1556
Congalach Ua Conchobair, d. 1051
Gilla Patraic mac Conchobair Ua Sibleain, 1051-1071
Conchobar mac Congalaig, 1071-1115
Muirchertach, ?-1095
Rogan mac Domnaill meic Conchobair, 1115-c.1118
Cu Faifne mac Congalaig, c.1118-1130
Donnchad mac Con Faifne, 1130-1134
Aed mac Domnaill, 1134-????
“List of kings of Uí Failghe” enters the record as wikimedia list article. Crown Archives preserves that source wording while asking what List, kings and Failghe can confirm, complicate or overturn.
Why this record matters
“List of kings of Uí Failghe” is worth following because a concise public description often conceals a longer documentary argument. Here, List, kings and Failghe provides the most credible route into that argument.
The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Jun 2, 2024. The linked authority identifier is Q6624675. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1556, 1051, 1071 and 1115.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “List of kings of Uí Failghe”, its source revision and the description used here.
- Expand the search: follow List of kings of Uí Failghe primary sources, List of kings of Uí Failghe archive and List research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “List of kings of Uí Failghe”?
- Which cited source is closest to the event, object or claim?
- Which institution is responsible for the underlying evidence?
Search terms from this dossier
This entry incorporates text from “List of kings of Uí Failghe” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.