Yes it is known that the Portuguese warrior was Pinhao. Thanks Fernando for putting much time in to this. I had not seen this particular paper but seen Similar ones. there are 3 interpretations circulating so I was interested in trying to get some independant confirmation.
, some say it is Samarakoon rala/Kuruwita Bandara others say it was Rathnayaka mudiyanse and 3rd it was the king of Jaffna. each interpretation given by people with good standing, so only the text shall say for sure. The key is if the word Jaffnapato is really there that will rule out the other two.
There was a Portuguese fort for a time close to the Saman devale premises. this was possibly erected there and later moved to the devale after destruction of the fort. Sri Lanka is a small country so warriors were deployed all over the place.
Regards and thanks