Cellach húa Rúanada

Cellachy held the post of Chief Ollam of Ireland and died in 1079. His obit is given in the Annals of the Four Masters as follows- "M1079.4 Ceallach Ua Ruanadha, chief poet of Ireland in his time, died."

Cellach húa Rúanada, Irish poet, died 1079.

His obituary is given in the Annals of Ulster as follows- "U1079.1 Cellach ua Ruanada, chief ollav of Ireland, rested in peace."

His obituary is given in the Chronicon Scotorum as follows- "Annal CS1079 Kalends. Cellach ua Ruanadha, ollamh of Ireland, dies."

An Irish clavis or metrical tract has been preserved in the Book of Leinster as well as in the eighteenth-century manuscript Trinity College H 1 15, where it was copied from a fourteenth-century exemplar that seems now to be lost. Rudolf Thurneysen incorporated this poem in his Mittelirische Verslehren as Verslehre IV. In the Book of Leinster it was ascribed to a certain Cellach .h. Ruan, who may be identical with Cellach hua Ruanada.