It seems that many 45-70's are named 'Thumper' as mine is. My favorite is still my old 30-30 tapered barrel. It is light and 'handy' and I always called it 'Sweety'.
Only other gun that named is my Bushmaster AR and that is 'Thelma'. That's because my name is Lewis, or Louie, or Lew for short. So it comes out close enough that I just named it after the combination, 'Thelma and Louise'. 44 Man