Definition: Eponymous: The Greek word for "origin," which means "beginning" or "root." Definition: An origin, starting point, or common thread connecting all members of a particular community or group. It could refer to the first book in a series, the first song on an album, the first meeting of two groups, etc. Example: - In Christianity, Jesus' name is eponymous, as he was not simply born into this world but God himself, coming forth from above as the beginning and end of all things.