Where does “pretosemolo” come from?

pretosemolo (Italian) comes from Italian petrosemolo, from Vulgar Latin petrosenilo, from Latin petroselinum, from Ancient Greek πετροσέλινον, from Ancient Greek Πέτρος, from Ancient Greek πέτρος — rock, stone, boulder; type of reed.

Ancestry of “pretosemolo”, step by step

Step	Language	Word	Meaning
1	Italian	petrosemolo	—
2	Vulgar Latin	petrosenilo	—
3	Latin	petroselinum	rock parsley
4	Ancient Greek	πετροσέλινον	parsley
5	Ancient Greek	Πέτρος	Peter
6	Ancient Greek	πέτρος	rock, stone, boulder; type of reed

Every word from Ancient Greek πέτρος →Every word from Ancient Greek Πέτρος →Every word from Ancient Greek πετροσέλινον →