I named mine so that my wife and I could communicate about me carrying without telling the world Im carrying. "Hey you got Johnny with you?" Which the answer is always yes so its not really worth asking anymore but whatever, he's named
Occasionally, I'll refer to my Walther PPS as "Carl." Other than that, nope. The Glock 19 is "the Glock", and I've got "the Bobtail" , "the 1911", "the Snubby", "the .357, or "the Smith", and names like that.
My favorite name for a gun is Steven Colbert's "Sweetness"