Rudhraighe Ó Domhnaill, 1st Earl of Tyrconnell (also known as Rory O'Donnell) (1575 – 30 July 1608) was the last King of Tír Chonaill (or Tyrconnell). An apparent original of the letters patent of the Earldom were in the possession of Count Maximilian Karl Lamoral O'Donnell in Austria, although that family did not inherit the title, nor the related territorial Lordship of Tyrconnell, the remainders of which were destined elsewhere.