Jay,
The only notes I can find are from a lecture that Joao Ventura, the archivist, gave. Starting in the 2nd time period which was roughly 1696/early 1700s to about 1860, the godmother could be a saint or the Virgin Mary. I wrote no other explanation. Maybe that was the thing back then. I know in America, in the 1960s (Vatican II), at least one of the godparents had to be Catholic, not both anymore. That's how my Baptist mother became a godmother to a couple of her best friend's kids - my dad was the Catholic. So things just change over time.
From my understanding, when someone invoked a saint or the Virgin Mary, someone (in flesh and blood) has to touch the crown or whatever insignia it may be to represent that saint or Mary. So who touched it? A family member? The gardener who was outside working? Terri Santos said her grandmother (or was that an aunt) used to hang around the church because she could write her name. Someone needed a witness to something, and there she was, ready to sign, for a fee, of course.
Cheri Mello
Listowner, Azores-Gen
Researching: São Miguel island: Vila Franca, Ponta Garca, Ribeira Quente, Ribeira das Tainhas, Achada