Book of Uí Maine

Leabhar Ua Maine
Royal Irish Academy
Also known as	The Book of Hy-Many, Leabhar Uí Dubhagáin
Type	Compilation of Irish legends
Date	1392–94
Place of origin	Uí Maine
Language(s)	Middle Irish
Scribe(s)	Ádhamh Cúisín, Faolán Mac an Ghabhann na Scéal
Patron	Muircheartach mac Pilib Ó Ceallaigh
Material	Vellum
Size	44cm x 27cm
Format	Folio
Script	Irish minuscule

Leabhar Ua Maine (also Leabhar Uí Dubhagáin, The Book of Hy-Many and RIA MS D ii 1) is an Irish genealogical compilation, created c. 1392–94.

Previously known as Leabhar Uí Dubhagáin, after Seán Mór Ó Dubhagáin, d.1372 of the prominent family of historians and musicians in East Galway, it was later also known as the Book of the O'Kelly's, written at the behest of Muircertach Ó Ceallaigh (d. 1407), Bishop of Clonfert (1378–93) and then Archbishop of Tuam (1393–1407).

The book was written by ten scribes in Uí Maine before 1392 and sometime after 1394. There were ten scribes, eight of whom are anonymous. The principal scribe and overall compiler of the manuscript was Ádhamh Cúisín (fl. c.1400); the only other scribe known by name is Faolán Mac an Ghabhann na Scéal (d. 1423).

It is a massive, oversized vellum book written in Irish. It was property of the O'Kelly clan until 1757, when it was sold to William Betham In 1814, Betham proceeded to sell the manuscript to the Richard Temple-Nugent-Brydges-Chandos-Grenville, 1st Duke of Buckingham and Chandos. The Duke then donated the manuscript to the Royal Irish Academy in 1883, where it is currently housed.

The manuscript is a massive, oversized vellum book written in Irish, its contents are described by one of the scribes as bolg an tsolathair (a mixed bag of contents). It includes a series of metrical dindsenchas, An Banshenchas, Cormac's Glossary, Lebor na Cert, portions of Lebor Gabála, poems, genealogies and pedigrees.

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