Cellach mac Rogallaig died in 705.
Cellach mac Brain died in 834.
Cellach mac Dúnchada died in 776.
Cellach mac Fáelchair died in 735.
Cellach mac Máele Coba died in 658.
Cellach Tosach mac Donngaile died in 809.
Cellach Cualann died in 715.
Cellach of Armagh died in 1129.
Cellach húa Rúanada died in 1079.
Cellach of Armagh was born in 1080.
Manchester
Well you will find out but if you do like him go get him
Mac Beathaidh mac Ainmire died in 1041.