Answer: False
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Step-by-step explanation:
The Merriam-Webster dictionary says in the etymology section that
"Marathon, Greece, site of a victory of Greeks over Persians in 490 b.c., the news of which was carried to Athens by a long-distance runner".
In other words, Marathon was named after a place to refer to the messenger who ran a very long distance.
When I used a translator, it said that the Greek word for month is μήνα which is pronounced "mina" in English.