Eurytion

He found Dexamenus on the point of betrothing perforce his daughter Mnesimache to the centaur Eurytion, and being called upon by him for help, he slew Eurytion when that centaur came to fetch his bride. But Eurystheus would not admit this labour either among the ten, alleging that it had been performed for hire.


- Apollodorus, Library, Book 2, Chapter 5, Section 5