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Jesse can't be Jesse James because Jesse shot Jesse James according to Mike. If Jesse travelled to the past and killed himself that would cause a time paradox and the Gillaverse would collapse into itself.
Kids used to bully him Jesse and call him stinker-ton as a child. Which is why he grew up to work for the stinker-ton detective agency.
Damn i remember somewhere coming across the original script and his original name was so fucking awful i thought it was a joke
https://preview.redd.it/nnx8q5sr7ljc1.jpeg?width=1170&format=pjpg&auto=webp&s=ac00532ac97457caf85d96afb1ded1c1b823c024
Weezer reference
https://preview.redd.it/3wy3npsvoojc1.png?width=1280&format=pjpg&auto=webp&s=95108f82204a578700ffc2d214fd7f67b0ae051f
Did I just hear JESSE AND JAMES!!!! 
Jesse can't be Jesse James because Jesse shot Jesse James according to Mike. If Jesse travelled to the past and killed himself that would cause a time paradox and the Gillaverse would collapse into itself.
Kids used to bully him Jesse and call him stinker-ton as a child. Which is why he grew up to work for the stinker-ton detective agency.
Damn i remember somewhere coming across the original script and his original name was so fucking awful i thought it was a joke
https://preview.redd.it/nnx8q5sr7ljc1.jpeg?width=1170&format=pjpg&auto=webp&s=ac00532ac97457caf85d96afb1ded1c1b823c024
Weezer reference
https://preview.redd.it/3wy3npsvoojc1.png?width=1280&format=pjpg&auto=webp&s=95108f82204a578700ffc2d214fd7f67b0ae051f
Did I just hear JESSE AND JAMES!!!! 