Peanuts in the american south used to be called ‘goober peas’. If people were selling ‘goober peas’ nowadays I’d also expect the packet to warn people that they’re eating peanuts. It’s reasonable to expect companies selling peanuts to have them properly labelled, instead of expecting people with allergies to learn every colloquial term.

I agree. Being allergic to peanuts, but not nuts, I eat all kinds of nuts all the time. I could easily see a kid with the same allergy situation as me seeing “monkey nuts” and not questioning it. That is, oh this is another kind of nut like walnuts or pecans. If I had known as a kid that I could eat nuts, I could easily see myself doing this. That said, my mom quite reasonably worried when I was a kid that the allergy test could have shown a false negative (this does happen) for nuts, so I avoided any kind of nut and it wasn’t until my adult life that I decided for myself to try cashews (with epi-pen nearby just in case). So I guess if I ever encountered monkey nuts as a kid, my mom saved me from this situation.

Peanuts are in the legume family, which includes beans.

While many people are allergic to peanuts, and many people are allergic to nuts, these allergies don’t always occur together. A good friend of mine has a dangerous nut allergy (he carries an EpiPen), but he can eat peanuts without problems.

However, machinery that it is used to process nuts is sometimes used to process peanuts, or vice-versa, so labeling is important.