sentences:  Maine, ancestor of the Cenél Maini is generally presumed to be a late addition.The dates claimed for Lóegaire mac Néill, "great pagan Emperor of the Irish" and adversary of Saint Patrick in Muirchiu and Tirechán's 7th century lives, may make him an unlikely son of Niall.Diarmait mac Cerbaill, apical ancestor of the Síl nÁedo Sláine and Clann Cholmáin, the leading southern branches of the Uí Néill, is presented in the genealogies as the grandson of Niall's son Conall Cremthainne, but this is doubtful.