Analysis of information sources in references of the Wikipedia article "אומברים" in Hebrew language version.
Solinus informs us that Bocchus, a writer who has been several times cited by Pliny, reported the Umbri to have been descended from the ancient Gauls; and a similar account of their origin has been adopted, either from the same or from different testimony, by Servius, Isidore, and other writers of a late period.
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: (עזרה)