"While I was in Ireland I picked up at one of the bookshops a McInerney
family history and crest suitable for framing with the decription in the
attached Word document.  I have retyped it as best I could.  The Spelling of
Oium as in Oilioll Oium 3rd century provincal king is a ASCII representation
and other acent marks are not reproduced as well."

And here are the images:

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Here is the text:

 Mc Inerney and its variants Mc Nerney and Nerney are the surnames borne by a number of renowned erenagh families of Ireland. Erenagh denotes a custodian of church lands. Originally an ecclesiastical office, in later times it evolved into an hereditary position held primarily by laymen. During the Middle Ages, the most prominent family was established in Connacht. A branch of the O'Branáin sept of Roscommon, their forebears were Chiefs of Corca Anchllann, a vast territory comprising much of the east of the country. Of ancient lineage, these Mc Inerneys descended from the noble Druid Ona who granted the site of the church at Elphin to St. Patrick. Almost six centuries later, the Mc Inerneys became erenaghs of this church as well as the one at Tuam in neighboring County Galway.
 However, in present day Ireland, the name is most popular in Munster, particularly Clare, where the great majority of Mc Inerneys are of the same stock as the O’Briens and Mc Namaras. Of Dalcassian ancestry, the Mc Inerneys’ progenitor, Cormac Cas, was the son of Oilioll Oium, 3rd century King of the province. Although their early origins as erenaghs is obscure, by the year 1300 they were recorded in the Irish Annals as a distinct sept. Centered in Lower Bunratty barony in southeast Clare, they maintained their principal stronghold at Ballycally in the old parish of Kilconry. For more than three hundred years, the Mc Inerneys were able to retain their predominate position in the region. As a result of the 17th century confiscations and resettlements, their vast estates were lost, nevertheless the sept was not displaced. Until recent times, the local pronunciation of the name was Mac Inerheny; the spelling favored by Father Laurence Mac Inerheny, the priest martyred by the Cromwellians in 1642.