Where does “larouy” come from?

larouy (Mauritian Creole) comes from French rouille, from Old French reoïlle, from Vulgar Latin robicla, from Latin robicula, from Latin rōbīgō, from Latin rōbus, from Proto-Italic rouβos, from Proto-Indo-European h₁rewdʰ- — red.

larouy (Mauritian Creole): rust

Definitions

rust

Ancestry of “larouy”, step by step

Step	Language	Word	Meaning
1	French	rouille	rust; rouille
2	Old French	reoïlle	—
3	Vulgar Latin	robicla	—
4	Latin	robicula	—
5	Latin	rōbīgō	rust
6	Latin	rōbus	red
7	Proto-Italic	rouβos	—
8	Proto-Indo-European	h₁rewdʰ-	red

Every word from Proto-Indo-European h₁rewdʰ- →Every word from Proto-Italic rouβos →Every word from Latin rōbus →