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

In Greek mythology, Byblis was a daughter of Miletus. She fell in love with Caunus, her brother. He ran away and she followed him through much of Greece and Asia Minor until she finally died, tired and sad. She was changed into a spring.

Alternative: Bublis

Ovid IX, 450.