The Greek historian who linked the 426 BC Malian Gulf tsunami to an earthquake was Thucydides.
In his History of the Peloponnesian War, Thucydides described an earthquake sequence, the sea retreating, and a large wave flooding coastal settlements around Euboea and the Malian Gulf. He argued that the earthquake was the cause of the tsunami, recognizing a physical cause-and-effect relationship rather than attributing the event to divine action.
His account is important in the history of natural-disaster science. He described several characteristic tsunami signs, including sudden withdrawal of the sea followed by its return as a destructive inundation. The event occurred during the Peloponnesian War and was part of an earthquake sequence that influenced military plans, including a Spartan invasion attempt.
The other names are associated with Greek historical and geographical writing, but they are not the canonical answer to this question. Herodotus had earlier recorded a tsunami at Potidaea and attributed it to the anger of Poseidon, making the contrast with Thucydides especially notable. The exact fault and earthquake source of the 426 BC event remain uncertain.