Where does “Medusa” come from?

Medusa (Portuguese) comes from Ancient Greek Μέδουσα, from Ancient Greek μέδω, from Proto-Indo-European mēd-, from Proto-Indo-European med- — to measure; to give advice; healing.

Medusa (Portuguese): Medusa creature with a petrifying gaze

Definitions

Medusa creature with a petrifying gaze

Ancestry of “Medusa”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	Μέδουσα	Medusa
2	Ancient Greek	μέδω	to protect, rule over
3	Proto-Indo-European	mēd-	to measure
4	Proto-Indo-European	med-	to measure; to give advice; healing

Every word from Proto-Indo-European med- →Every word from Proto-Indo-European mēd- →Every word from Ancient Greek μέδω →