signified a person who had a defect in his ankles or feet (Scaurum, pravis fultum maic talis, Hor. Sat. 1.3. 47), and was used, like many other words of a similar kind, as a cognomen in several Roman gentes.
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A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890