At my current company, where I've been for over ten years, I've always just made up a title to match my current focus/what seemed "fresh." My original external title that was made up to hire me didn't actually make a lot of sense and differed from the internal HR title anyway.

Ended up doing something similar in my original tech job as well. I'm not sure I've ever really used my official HR title and would probably have to look it up to be sure I'm remembering it correctly.