Where does “Pȳthō” come from?

Pȳthō (Latin) comes from Ancient Greek Πῡθώ, from Ancient Greek πύθω — to rot, to decay.

Ancestry of “Pȳthō”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	Πῡθώ	Pytho; Python; Pytho, Delphi; Pytho
2	Ancient Greek	πύθω	to rot, to decay