What does lupin mean off of Harry Potter?

Answer 1

Lupus is the name of the wolf constellation in the Southern Hemisphere, also it is the specific name for Canis Lupus the grey wolf. I think Lupus also means wolf in Latin.

Lupin is another of Rowlings semi-latin verions of words, (like her spells, they're almost Latin words)

Also Lupin's first name is Remus, presumably from the story of Romulus and Remus in Roman legend: Two young boys raised by a she-wolf, who went on to found Rome and became the first Romans.