Jackson Dent is a universal prime. A Jack or Jackie or Jackson or some variant thereof can be found in every world. Or his corpse can.
Here are a few Jacks we have met.
Jack Dent of Earth 2749.108300…
This Jack moved into a house occupied by Doc Landreth and a cat called Normal. His life became considerably more complicated after that.
Jackie Denton, Squeeble Detective
Jackie is one of the big slow things that helps squeebles with people problems and sometimes, though rarely, people with squeeble problems.
Jackie lives in the small seaside town of Westgate-upon-sea where she is widely regarded (in as much as she is noted at all) as a slightly dotty old woman who talks to herself. Which, if you think about it is perfectly normal as most people cannot see who she is talking to.
Jackson Dent, shelf stacker, (Unknown Earth)
His life was simple and boring. Then one day refugees from a doomed timeline showed up and made it complicated.
A captain in an army made up of Jacks. Don’t ask, things get complicated.
See also Jacks and Jacks of just about every other rank too. There are rather a lot of them.
Jackson Dent of the glade
Gifted with world walking abilities by the sap of the glade. This Jackson dent vanished with a number of druids in the 1960s and has not been seen since.
Jackson Dent, Vampire
It is probably safe to say that his is not a world you want to visit. 2749.108’s Jacks narrowly avoided going there in 2016.
A leaf on the wind. Fate seems to have her own plans regarding this strange Jack.