The last name O’Neill comes from the Irish Ó Néill or Ui Neill in Gaelic ... of Eógan mac Néill and a branch of the Uí Néill dynasty. In turn, this dynasty got their name from Niall ...

Everything you need to know about the Irish surname O'Neill. Over 70 million people worldwide ... were a branch of the Uí Néill dynasty who took their name from Niall of the Nine Hostages ...

Professor Bradley's team consulted genealogical experts who provided a contemporary list of people with surnames genealogically linked to the last known relative of the "Ui Neill" dynasty ...