The original git flow suggestion [0] was posted more than 15 years ago (date on the post is 2010). It didn't entirely invent the branch names/conventions from whole cloth, it was based on plenty of prior history in SVN spaces especially, which it picked up from CVS.

(Personally, for long term parked branches I prefer `{username/dev name}/` branches because then you know who the owner is without having to look at the commit log and guess based on recent commit authors. But that's the fun thing about branching conventions, there are so many to choose from, many of which have been around forever.)

[0] https://nvie.com/posts/a-successful-git-branching-model/