Mael Ísu Ua Brolcháin (died 1086), Irish churchman and writer.
A member of a high-class ecclesiastical family in what is now County Donegal, "genealogical sources give his father as Máel Brigte and his three brothers as Áed, Diarmait, and Muirecan."
Besides holding a number of benefices and wielding considerable political influence, he was the author of the poem To an Elderly Virgin. He died as a member of the religious community of Armagh in 1086, recorded as being the chief sage of Ireland.
Members of his lineage served as Bishop of Derry.
His best-known work is a Latin and Irish hymn, Deus Meus Adiuva Me.[1] Here are the modern Irish lyrics. For a translation by Professor Gerard Murphy of this well-loved piece see link below:
Domine da quod peto a te,Tabhair dom go dian a ghrian ghlan ghlé,Tabhair dom go dian a ghrian ghlan ghlé,Domine da quod peto a te.
Domine, Domine, exaudi me,M’anam bheith lán de d’ghrá, a Dhé,M’anam bheith lán de d’ghrá, a Dhé,Domine, Domine exaudi me.
For translation see Deus Meus, Adiuva Me and live version sung with harp