Eli5- why is Philippines spelled with Ph but Filipino is spelled with a F?

Question

As the title says. I googled it and didn’t quite understand so here I am. Make it make sense please.

In: Other

Answer 1

Philip is a name of Greek origin which starts with a Phi “Φ”.

Some languages keep the “Ph” spelling as a nod to the Greek origin of the word. Some languages change the spelling to “F” (such as Felipe) to match the phonetic rules of the local language. Sometimes since it’s a proper noun the rules can be applied inconsistently. That appears to be what has happened here.

As an added twist, the native language if the Phillipines, Tagalog, does not have the /f/ sound.