Μαράθωνις

Alas! Could not find the search term Μαράθωνις.
Found the closest form Μαραθῶνί. Other nearby forms can be found in the wordwheel, or perhaps try searching again without accents.

Morpho works with a static database. If you like, you can compare the output of Morpheus.

Parsed as:

✓ Proper-name noun masculine dative singular of Μαραθών