Hugh Roe O'Donnell (1572–1602) was an Irish nobleman and a prominent leader during the Nine Years' War against English rule in Ireland. He was born into the O'Donnell dynasty, which ruled the region of Tyrconnell. O'Donnell became known for his military skills and his efforts to unite various Irish clans against English encroachment. In 1595, he was appointed as the chief of the O'Donnell clan and quickly emerged as a key figure in the struggle for Irish independence. His leadership was marked by significant battles, including the victory at the Battle of Clontibret in 1595. O'Donnell's legacy is remembered for his role in the fight for Irish sovereignty.