I know that having a Red name makes you immune to instant kill effects, caps your stat damage at 10 for each stat and makes you immune to autocrit from stat damage (although you can still go into autocrit from stat penalties).
I know that having a Purple name gives you all the same benefits that a Red name gives you and also makes you immune to stat damage.
What does having an Orange name actually do for you? You can still be Vorpalled, Fingered, etc. Orange named critters usually have more HP than generic trash, but that is just because they have more HP, it isn't an actual benefit from the Orange name itself.
Anyone know what having an Orange name actually does for a miniboss?