The Oeagrus reference article from the English Wikipedia on 24-Apr-2004
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Oeagrus

In Greek mythology, Oeagrus was a king of Thrace. He the muse Calliope are possibly the parents of Orpheus and Linus.

He is sometimes called the son of Ares, but other times Charops is mentioned as his father, which explains his inheritance of the throne.

Alternative: Oeager