This situation surfaced in our stake several years ago when they created a new ward. Instead of creating the Pine Tree Fourth Ward, , we ended up with a Pine Tree Fifth Ward instead. We were told that was because there was another unit in the church elsewhere called the Pine Tree Fourth ward and all ward names had to be unique.
I ask because when I was looking in CDOL, I found another ward with the same name as my current ward. I thought that wasn't permitted and that's why you get creative unit names like "East Vally Sun Rising Over the Purple Mountains Stake" in areas with many church members, like Utah. You can probably sense a slight amount of exaggeration in my example of a creative unit name
