Name Prefix:<NPFX> King Niall Noigiallach "of the nine hostages," King of Tara. Liv ing400 AD, in whose time the Royal house of Tara asserte d a nominal suzerainty over the whole island. He was possib ly the Irish king who campaigned against Stillecho, father- in-law of the Roman Emperor Honorius; and was anyway slai n (by a thunderbolt or by a hostage King of Leinster) whil e engaged in the wars abroad.