Those don’t need to be consecutive. King Charles III’s father was not King Charles II. So he could just be the 4th in his family with that name. And the dad was the 3rd in family with the other name.

But it’s also possibly a nickname thing.

Pretty sure that’s what happens nearly everywhere not specifically the UK.

Everyone should have started wearing pants with a ton of text on it.

“Semper fi” maybe?

Yeah, but olive oil is also a mild laxative.
https://www.healthline.com/health/digestive-health/olive-oil-for-constipation