MacDermot (No.1) family genealogy

Princes of Moylurg, County Roscommon

Arms: Ar. on a chev. gu. betw. three boars' heads erased az. tusked and bristled ar, as many cross crosslets ar. Crest: A demi lion ramp. az. holding in the dexter paw a sceptre crowned or.

MAOLRUANAIDH [MULROONA] MÓR, a younger brother of Conchobhar (or Connor) who is No. 106 on the "O'Connor" (Kings of Connaught) pedigree, was the ancestor of "Clan Mulroona;" the leading family of which was MacDiarmuid, anglicised MacDermott. Among the other families of "Clan Mulroona" were—1. Mulrooney, modernized Rooney, Roney, and Rowney; 2. MacDonough, O'Crolly, etc.

106. Mulroona Mór: son of Teige, married the dau. of Flann Abraid O'Malley.

107. Murtogh: his son; Prince of Moylurg; m. the dau. of O'Dowd, Lord of Tyrawley.

108. Teige: his son; had a brother Mulroona, who was the ancestor of O'Crolly.

109. Mulroona: second son of Teige.

110. Teige Mór: his son.

111. Diarmaid ("diarmaid:" Irish, the god of arms): his son; a quo MacDiarmuid. Had two brothers—1. Donoch, the ancestor of O'Morris; 2. Teige Oge, ancestor of MacLaughlan, of Connaught.

112. Conchobhar (or Connor): his son; was the first of this family who assumed this sirname.

113. Tomaltach (or Timothy) na Carriga ("cairig:" Irish, a rock): his son.

114. Cormac, Lord of Moylurg: his son; had a brother Donoch.

115. Conchobhar, Lord of Moylurg: son of Cormac; living A.D. 1251.

116. Giollachriosd: his son; had a brother Diarmaid Dall, who was the ancestor of MacDermott Roe (Ruadh).

117. Mulroona: son of Giollachriosd.

118. Timothy: his son.

119. Conor: his son.

120. Hugh: his son.

121. Rory Caoch [1]: his son.

122. Rory Oge: his son.

123. Teige: his son.

124. Rory: his son.

125. Brian: his son.

126. Brian Oge: his son; d. 1636.

127. Tirlogh (or Terence): his son; died unmarried in 1640. Had a brother named Charles, who died in 1693; and another brother named Teige na n-Gadhar.

128. Hugh: son of said Charles; died 1707. Was an officer under James II., and a prisoner at the Battle of Aughrim; had a brother Timothy, who had Andrew, who had John [2] and other children.

129. Charles (2): his son; d. 1758; got Coolavin; had a brother Terence, an M.P. in King James's Parliament, and attainted.

130. Myles: his son; d. 1777; had a brother Terence, and another Hugh. This Hugh had Charles, who m. Arabella O'Rourke, and had several children.

131. Hugh (2): his son; d. 1824.

132. Charles: his son; d. 1873.

133. Hugh MacDermott, of Coolavin, Q.C., J.P., living in 1887: his son; Chief of the Clan, and known as the "Hereditary Prince of Coolavin."


[1] Caoch: This Rory Caoch is the first name on the (No. 3) "MacDermot" pedigree, infra, which is taken from the MS. Volume, F. 3. 27, in the Library of Trinity College, Dublin.

[2] John: This John had three sons: 1. Edward, whose only son suffered death in 1798; 2. John; and 3. another son who was a General in the American Service, and settled there. This last mentioned John had John Wynne MacDermott, who had four sons:—1. John-Wynne, 2. James, 3. Phibbs, 4. William. This branch may be looked on as the third line of the sept.