Where does “lamproyon” come from?

lamproyon (French) comes from French lamproie, from Old French lamproie, from Latin lampreda, from Latin lampetra, from Latin petra, from Ancient Greek πέτρα — rock formation: cliff, ledge, cave, ridge; stone.

Ancestry of “lamproyon”, step by step

Step	Language	Word	Meaning
1	French	lamproie	lamprey
2	Old French	lamproie	lamprey
3	Latin	lampreda	lamprey
4	Latin	lampetra	—
5	Latin	petra	stone, rock
6	Ancient Greek	πέτρα	rock formation: cliff, ledge, cave, ridge; stone

Every word from Ancient Greek πέτρα →Every word from Latin petra →Every word from Latin lampetra →