1. Constantine I is the eponym for constantinople.

2. Down's syndrome is an eponym for the English physician john down.

3. You of course know that an eponym is a word that started out as someone's name.

4. These nodes have the eponym "the node of Sister Mary Joseph" and are a signal of significant intra-abdominal lymphadenopathy usually associated with malignant processes.

5. I was being interviewed recently and talking about a certain eponym that had morphed after it was first coined.