The MacFirbis Genealogies

 

These are online but somewhat hidden.

Go to the ISOS site (Irish Script on Screen)

http://www.isos.dias.ie/english/index.html

Go to: University College Dublin

On the right side of the screen click "Additional Irish MS 14"

The Cenel Eoghain pedigrees begin on p. 114 (O Neill).

Index: p. 854