Princes of Hy-Maine
From Irish Pedigrees; or the Origin and Stem of the Irish Nation by John O'Hart
Arms: Az. a tower triple-towered supported by two lions ramp. ar. as many chains descending from the battlements betw. the lions' legs or. Crest: On a ducal coronet or, an enfield vert. Motto: Turris fortis mihi Deus.
IOMCHADH, the second son of Colla-da-Chrioch, who is No. 85 on the (No. 1) "O'Hart" (Princes of Tara) pedigree, was the ancestor of O'Ceallaigh, Princes of Hy-Maine (in the counties of Galway and Roscommon); anglicised O'Kelly, Kalloch, Kellogg, and Kelly. In the Macariae Exidium  (or "The Destruction of Cyprus"), published in 1850, by the Irish Archaeological Society of Ireland, in small quarto, of about 520 pages, this family is traced down to our times.
86. Iomchadh: son of Colla-da-Chrioch.
87. Domhnall: his son.
88. Eochaidh: his son.
89. Main Mór ("mor:" Irish, great, large; "main," riches. "Main" also means the hand. Lat. "man-us"): his son; a quo the territory of Hy-Maine.
"The descendants of Main Mór," says O'Clery, "had many privileges and immunities from the Kings of Connaught and their successors; viz.—they were hereditary marshals or generals of the Connaught armies; they possessed and enjoyed the third part of all the strongholds, and sea-port towns in the province; also a third part of all prizes and wrecks of the sea, and of all hidden treasures found under ground, and of all silver and gold mines and other metals, belonged to them, together with a third part of all Eric or Reprisals gained and recovered by the Kings of Connaught from other provinces for wrongs received; with many other the like enumerated in the ancient Chronicles."
90. Breasal: son of Main Mór.
91. Dallan: his son.
92. Lughach: his son; had a brother Fiachra.
93. Fearach: son of Lughach.
94. Cairbre Crom Ris: his son.
95. Cormac: his son.
96. Eoghan Fionn: his son. Had a younger brother named Eoghan [Owen] Buac, who was ancestor of Madden, Clancy, Tracey, Hannan, Kenny, Hoolahan, etc.
97. Dithchiollach: son of Eoghan Fionn.
98. Dluitheach: his son.
99. Fiacalach: his son.
100. Inreachtach: his son; had a brother Coscrach.
101. Olioll: his son.
102. Fionnachtach: his son.
103. Ceallach ("ceallach:" Irish, war, strife): his son; a quo O'Cealliagh, of Hy-Maine, A.D. 874.
104. Aodh (or Hugh): his son.
105. Moroch: his son.
106. Teige: his son; the first of the family that assumed this sirname. This Teige, as King of Hy-Maine, was slain at the Battle of Clontarf, A.D. 1014, fighting on the side of the Irish Monarch, Brian Boroimhe [boru], and is called "Teige Catha Briuin," meaning Teige who fell in Brian's Battle (of Clontarf). This Teige O'Kelly, Brian Boru, and Brian Boru's son Moroch—all three slain at the Battle of Clontarf—were buried at Kilmainham, near Dublin.
107. Conchobhar (or Connor): his son; whose brother Taidhg was ancestor of MacTague—modernized Montague.
108. Dermod: son of Connor.
109. Connor: his son. This Connor O'Kelly "built twelves churches in Monvoy" (now 'Monivea'), in the county Galway; and bought 365 chalices of gold and silver, and as many copes and other necessaries for the Altar, of the richest stuffs that could be had, and distributed them among the clergy, to pray for his soul." He was King of Hy-Maine, and the seventh "O'Kelly."
110. Teige, of Talten: his son; the last King of Hy-Maine. In his time took place the English Invasion of Ireland.
111. Donal: his son. Had five sons, from the fifth of whom, who was named Dermod, is descended Keogh. This Donal's younger dau. who was named Amy or Mary, was the mother of Richard (or Rickard) de Burgo, the younger, a quo (see No. 18 on the "Bourke" Genealogy) Clanrickard.
112. Connor: son of Donal.
113. Donoch: his son; was the thirteenth "O'Kelly." Was twice married: by his first wife he had three sons—1. Main, from whom descended the eldest branch of the O'Kelly family, of Hy-Maine; 2. Melaghlin; 3. Edmond. By his second wife he had one son, named William Buidhe [boy], who (although the youngest son) held himself and his posterity, the power, chief rule, and government from the three elder brothers and their issue.
114. Main: eldest son of Donoch.
115. Philip: his son.
116. Murtagh: his son. After this Murtagh O'Kelly became a widower, he entered into Holy Orders; and was, by Pope Boniface IX., made Archbishop of Tuam.
117. Melaghlin: his son. Had a brother named Donal, who was father of Thomas, the father of William, the father of Edmond, the father of William, the father of Ferdorach, the father of Hugh, the father of William Kelly.
118. Donoch: son of Melaghlin.
119. Connor: his son.
120. William: his son.
121. William (2): his son.
122. Edmond: his son. Had a brother named Donoch Granna, who was father of Ferdorach, the father of Conor Kelly.
123. William (3): son of William.
124. William Oge: his son. Had a brother named Edmond, who was the father of Edmond Oge Kelly.
125. Edmond O'Kelly, of Coillavoy (or Coillaboggy): son of William Oge.
 Exidium: The Macariae Exidium is a secret history of the Revolution in Ireland , by Col. Charles O'Kelly, of Skryne or Aughrane, in the county Galway; and was edited from four English copies, and a Latin Manuscript preserved in the Royal Irish Academy, Dublin, with Notes and Illustrations, and a Memoir of the Author (of that work), and his descendants, by John Cornelius O'Callaghan, the esteemed Author of "The Irish Brigades, in the Service of France," etc.
Captain Denis O'Kelly, of Galmoy's Regiment, was the eldest son and heir of the aforesaid Col. Charles O'Kelly, author of the Macariae Exidium; he had a horse shot under him at Aughrim. He mar. Lady Mary Bellew, daughter of second Lord Bellew, but d.s.p., and left his estates to his cousin John Kelly of Clonlyon, by whom the line had been carried on to the present day.