Yeah, but:

n. Any of numerous plants of the genus Lupinus in the pea family, having palmately compound leaves and variously colored flowers grouped in spikes or racemes.

[Middle English, from Old French lupin, from Latin lup?num, from neuter of lup?nus, wolflike; see lupine2.]

Without an e at the end, it's just the plant name.

What about Riddle? I know he doesn't use it, but still.

Lupin is a flower, right?

Yes, apparently part of the pea family

Dennis Moore, Dennis Moore, riding through the night!/Soon every lupin in the land will be in his mighty hands!

Lupins are the same as bluebells. Or a variety thereof. No, probably the other way around, bluebells = a type of lupin.

Eta: that didn't even occur to me as an interpretation of the name, it always came across as much more wolfy than botanical

Right, but lupin is still as much an English word as it is French.

ETA: In my French dictionary, lupin doesn't have the second wolfy meaning.

Nearly Headless Nick? OK, "de Mimsy-Porpington" isn't quite French, but it's got a "de" in there. (And yes, I know I'm reaching here.)

(Also, I'd say that "Lupin" is just as French as "Malfoy" is.)

I thought of Lupin and Malfoy both as Latin... but I'm a linguistic troglodyte.

I thought of Lupin and Malfoy both as Latin... but I'm a linguistic troglodyte.

I always thought of Lupin as derived from Latin since I didn't even realize it was a plant in either language. However, mal, foi, vol, mort, étrange are all common French words. Voldemort has an obvious meaning as a French expression (or, rather, not that obvious, since it could mean "flight of death" or "theft of death"--both of which = cool).