Where does “Perrin” come from?

Perrin comes from Old French Pierre, a name derived from the Latin personal name Petrus.

Ancestry of “Perrin”, step by step

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

Perrin — Etymology, Origin & Word History | Etymology Explorer