Where does “Pèrrotîn” come from?

Pèrrotîn (Norman) comes from Norman Pièrrot, from Norman pièrre, from Old French Pierre, from Latin petra, from Ancient Greek πέτρα — rock formation: cliff, ledge, cave, ridge; stone.

Ancestry of “Pèrrotîn”, step by step

Step	Language	Word	Meaning
1	Norman	Pièrrot	—
2	Norman	pièrre	stone
3	Old French	Pierre	stone substance
4	Latin	petra	stone, rock
5	Ancient Greek	πέτρα	rock formation: cliff, ledge, cave, ridge; stone

Every word from Ancient Greek πέτρα →Every word from Latin petra →Every word from Old French Pierre →