original_query: Who was Donnubán or Donovan, and what was his role in tenth-century Ireland?
query: Who was Donnubán or Donovan, and what was his role in tenth-century Ireland?
answer: Donnubán (Donovan) was a 10th-century ruler of the Irish kingdom of Uí Fidgenti, possibly also of Uí Chairbre Áebda.  He's notable for his alliance with Ivar of Limerick and Máel Muad mac Brain against the rising Dál gCais, aiding Máel Muad in becoming King of Munster.  His lineage and the circumstances of his death are debated by historians.