Statistics for occurrence #1 of “Peloponnese” in text Library, book 2, chapter 1, section 1 of Apollodorus, Library:
... But Niobe had by Zeus （ and she was the
first mortal woman with whom Zeus cohabited） a son
Argus, and also, so says Acusilaus, a son Pelasgus, after whom
the inhabitants of the Peloponnese were called
Pelasgians. However, Hesiod says that Pelasgus was a son of the soil.
...