Hi Mark,
I just noted the thread, and just wanted to thank you for the kind words. I was delighted when I found the Brazilian attribution which I found in another source. It was a relief for me as well to finally find the answer to these mysterious swords after all of our pondering on them !
Besides that it opened a new dimension to our study on Spanish colonial weapons.
Nice work at noting the connection on Fernando's most interesting (as always!) acquisition.
All the best,
Jim