Why is the Portuguese ‘r’ pronounced as r and h?

Question

So I know at the start it’s pronounced as a h and anywhere else pretty much is the r sound.

But I want to know, where do these vastly different pronunciations come from?

How did it make its way into the Portuguese?

Why are both used and not just one or the other?

Why do some languages use some words like this? How could you look at an ‘r’ and hear a ‘h’ sound? (Ik different languages, different ways of speaking etc, but seeing as the ‘r’ is still pronounced as an ‘r’ im curious as to how the ‘h’ sound corresponds with it)

In: Other

Answer 1

Not answering the question but since I’m Portuguese and I never heard the “h” sound with a “r” involved, could you give me an example? 😅