HIPPIAS
550 (?) - 490 BC

From 528-510 BC, Hippias was the ruler of Athens, a tyrant,

The Spartans put an end to his rule and Hippias consequently teamed up with the Persians.

Asked by invading Persians for a good spot to go ashore and conquer, Hippias recommended to land on the coast of the Plain of Marathon.

So the Persians did, and the result became known as a big victory for Athens in the Battle of Marathon 490 BC.

Let Justin explain.

See also About the Ancient Greeks

What else?

There was also another Hippias, Hippias of Elis, a Greek philosopher, who lived roughly a generation after this Hippias.