Mine comes from my early days of outdoor activity in Northern Ontario. I grew up hunting and fishing with my father. I learned all I could about woodsmanship or what is now often called bushcraft.
Well, back in High School long, long ago Phys Ed my senior year was a whole bunch of different modules and one of them was woodsmanship where I excelled and really got to show what I could do. One of the pretty young ladies in my class called me Jungle Jim and it stuck. Not really a trail name but it will do...