Don't call it that. He didn't make it up. Descriptive names are better than memorial names anyway. Call it the known-unknown matrix, or known-unknown risk classification system.
It's a fine name, because everyone (in the USA) knows what is being referred to in only 2 words. AND we get to remember a feeling of amusement mixed with horror that we had at the time that man who said something so intelligent was simultaneously making decisions so catastrophically stupid and impactful to all of us.