Who is the legendary ancestor of the true Greek?

There are a couple of possible answers to this question. The first is Deucalion and his wife Pyrrha. Zeus decided to end the bronze age by flooding the world, Deucalion and Pyrrha survived by building an ark. The evidence of these two being the legendary ancestor of the true Greek comes from the myth of the flood. The second possibility is Hellen, the daughter of Deucalion and Pyrrha. The Greek Word for Greece is Hellas and the Greeks are often referred to as the Hellenics. This could be evidence of Hellen being the ancestor of the true Greek.