Arms:  Sa. three helmets in profile ppr.

Crest:  An arm embowed vested az. holding a scymitar all ppr.

Donchuan, a brother of the Monarch Brian Boru who is No. 105 on the "O'Brien" pedigree, was the ancestor of O'Cinnidh; anglicised Kennedy.

105. DonchaCuan: son of Cineadh.
106. Cineadh ("cineadh:" Irish, a nation or  kind, Gr. "gen-os;" Lat. "gen-us"): his son; a quo O'Cinnidh.
107. Aodh: his son.
108. Donchuan: his son.
109. Mahoun O'Kennedy: his son; first assumed this sirname.
110. Teige: his son.
111. Giollacomin (or Giollacaoimhghin): his son.
112. Donal-Cathaleitreach: his son.
113. Teige: his son; had a brother named Giollacomin.
114. Giollacomin (2): his son.
115. Giolla Padraic: his son.
116. Aodh: his son.
117. Donall: his son.
118. Gillcomin: his son; had two brothers - 1. Patrick, and 2. Donall Gall.
119. Padraic (or Patrick): his son.
120. Philip: his son.
121. Dermod: his son.
122. Maithan: his son; a quo "Clann Maithan Donn O'Kennedy."
123. Teige: his son; had three brothers.
124. Rory: his son.
125. Dermod O'Kennedy: his son; had four brothers.

REF:
'Irish Pedigrees' by O'Hart, Volume 1, Page 98, dated 1892, reprinted 1989.