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Unruoch III, Unroch III or (H)unroch III (c. 840 – 874, after 1 July) was the margrave of Friuli from 863 to 874. He was the oldest successor of Eberhard of Friuli. He married Ava, a daughter of Liutfrid of Monza, and left a son Eberhard of Sulichgau who married Ermentrude of France, granddaughter of Charles the Bald, but was succeeded by his brother Berengar. He left a daughter who became a nun in Brescia and was abducted by men of Liutward of Vercelli in 887 and forced to marry one of his relatives.