I’m sure you’ve heard of bluetick coonhounds and redbone coonhounds, but there are also redticks.
A redtick is not a cross between a redbone and bluetick.
It is a color variety of the English coonhound, which also included the bluetick and the Treeing Walker.
English coonhounds are not from England. (After all, there are no raccoons in England). The UKC, the main hunting hound registry in the US, recognized fox and coonhounds as a single breed, which it called the “English Fox and Coonhound.”
When all of these became separate breeds, the “odds and ends” dogs that didn’t meet the standards of any of the newly recognized breeds remained as English coonhounds. These dogs come in a bluetick (but are not the same as the bluetick breed), tricolor, the aforementioned redtick, and tricolor with ticking.
This is the only breed I know of that was created in this way. English coonhounds exist because of what they are not. Except for bluetick and tricolored English coonhounds, these dogs didn’t have the right colors to be registered as the newly standardizing coonhound beeds.
I’ve never heard of anything else like it.